Bilimin Büyüsü — Chapter-by-Chapter Outline

Author: A. M. Celal Şengör (Ali Mehmet Celâl Şengör) First published: 2019 Edition covered: First and only edition, İnkılap Kitabevi, Istanbul, 2019 (ISBN 9789751039422, 160 pages). The book collects nineteen weekly newspaper columns Şengör published in Habertürk under the column name "Bilim Penceresi" (Science Window) between December 11, 2017 and April 23, 2018. Because the source material is a column series rather than a conventionally structured monograph, the "chapters" here are the individual columns in their original publication order.

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Central thesis

Bilimin Büyüsü (The Magic of Science) argues that science is the only reliable method humanity has ever developed for obtaining knowledge about the natural world, and that the entire sweep of intellectual history—from the pre-Socratic Greeks through Darwinian evolution and plate tectonics—can be understood as the slow, contested expansion of that method against competing forms of authority: myth, religion, dogma, and pseudoscience.

Şengör's organizing claim is double-edged. First, science is not a body of facts to be memorized but a self-correcting process driven by criticism: every claim is provisional, every theory improvable. Second, the capacity for this kind of critical inquiry is humanity's single evolutionary advantage—the "only weapon" a physically defenceless animal possesses. Societies that have suppressed criticism stagnated; those that institutionalized it produced cumulative knowledge.

The book traces this argument through three interlocking lines: the philosophy of science (what makes a claim scientific?), the history of science (how did the method spread from ancient Miletus through early-modern Europe?), and the natural science itself (geology and evolutionary biology as the richest modern examples). Each column in the series adds one brick to a single wall.

If humanity has only one survival tool, what is it—and how did we almost forget how to use it?

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Chapter 1 — Bilimin modern aşamalarıyla tanışalım (Let Us Get Acquainted with the Modern Stages of Science)

Published December 11, 2017. Inaugural column.

Central question

Why does science matter to ordinary citizens, and what distinguishes it from other claims to knowledge?

Main argument

Science as a condition of civilisation. Şengör opens by insisting that science is not an academic luxury but the invisible infrastructure of modern life: bridges stand because of structural mechanics, drugs work because of biochemistry, crops yield because of genetics. To be scientifically illiterate is to be unable to evaluate the forces that shape one's own existence.

Karl Popper's falsifiability criterion. The column introduces, attributed explicitly to the philosopher Karl Popper, the defining property of scientific statements: they must be, in principle, refutable by observation. A claim that can accommodate any evidence—that cannot be shown wrong even in principle—is not science. This criterion will recur throughout the series as the boundary between science and pseudoscience.

Historical examples: Newton and Einstein. Newton's laws of motion held for two centuries as the gold standard of scientific achievement—precise, predictive, falsifiable. Einstein's special relativity (1905) showed that Newton's mechanics was an approximation valid at low velocities, not a final truth. Rather than destroying science, this episode exemplified it: a better, more encompassing theory displaced a good one. Aristotle's physics had held for two thousand years without being successfully challenged, partly because the culture lacked the institutionalized criticism needed to test it.

The pseudoscience contrast. Astrology, prophecy, and occult practices are presented as false candidates for scientific status: they generate predictions so vague that any outcome can be interpreted as confirmation. This is not a modern failing; Şengör notes that throughout history pseudoscience has been "presented to people as legitimate science" precisely because it mimics science's prestige without accepting its discipline.

Key ideas

• Popper's falsifiability distinguishes science from non-science, not truth from falsehood.
• Science's strength is precisely its willingness to be wrong—and to correct itself.
• Newton's displacement by Einstein is a feature, not a bug, of the scientific enterprise.
• Myth, astrology, and magic share the property of unfalsifiability.
• The stakes are civic as well as intellectual: democratic citizens need scientific literacy to evaluate policy claims.

Key takeaway

Science is not a catalogue of correct answers but a self-correcting procedure defined by its openness to falsification—and understanding this distinction is the precondition for everything that follows in the series.

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Chapter 2 — İnsanın tek silahı: Akıl (Humanity's Only Weapon: Reason)

Published December 18, 2017.

Central question

Why did humans, the most physically defenceless of large animals, survive and come to dominate the planet?

Main argument

The biological argument for intellect. Şengör opens with a comparative anatomy exercise: lions have claws and speed, elephants have size, hedgehogs have spines. Humans have none of these natural armaments. The only trait that compensates is the capacity for reasoned prediction—the ability to model the world and anticipate danger before it arrives. Reason is not an ornament; it is the adaptive core of the human phenotype.

From hypothesis to dogma. The capacity for hypothesis-formation brought an early civilizational risk: the same minds that invented models of the world also tended to freeze those models into sacred traditions enforced by social authority. Questioning a founding myth was not merely heretical—it was often punishable by death. The tension between the human need to form beliefs and the social impulse to calcify them into unchallengeable dogma runs through all of subsequent intellectual history.

Religion's double role. Şengör is careful not to frame religion as simply the enemy of knowledge. Religious institutions performed a crucial archival function: they preserved astronomical calendars, mathematical tables, and agricultural knowledge across generations when no other institutions existed to do so. Sacred calendars were indispensable for coordinating planting seasons—yet their sacred status made revision almost impossible. This is the paradox: the same authority that preserved knowledge also impeded its correction.

The Milesian breakthrough. The column credits Thales and Anaximander of Miletus (7th–6th century BCE) as the first documented intellectuals to frame explanations of natural phenomena in terms of natural causes rather than divine intervention—and, crucially, to invite public criticism of those explanations. The geometric proofs of the Milesian tradition demonstrated "that humans could attain certain knowledge without divine aid." This moment of institutionalising criticism is presented as the decisive step in human intellectual history.

Key ideas

• Physical defencelessness is the evolutionary pressure that made human intelligence indispensable.
• All early human societies formed explanatory models of the world (proto-hypotheses).
• Social authority tends to convert provisional hypotheses into unchallengeable dogmas.
• Religious institutions simultaneously preserved and suppressed knowledge.
• The Milesians pioneered the critical, naturalistic method that distinguishes science from all prior knowledge systems.

Key takeaway

Reason is humanity's only biological weapon, but its full power is only unlocked when reason is institutionalized as criticism rather than frozen as dogma—the cultural leap the Milesians made.

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Chapter 3 — Doğruyu aramanın yolu: Eleştiri (The Path to Truth: Criticism)

Published December 25, 2017.

Central question

What specific intellectual practice did the ancient Greeks invent that set Western science apart from all other knowledge traditions?

Main argument

Anaximander's method. This column deepens the Milesian story. Anaximander did not merely propose a different cosmology from Thales; he publicly criticized his teacher's model (that the world floats on water) and argued that a body of water cannot itself be the primary substance because water, like everything else, requires explanation. The act of a student publicly refuting his teacher's claim in a structured argument—without social or religious sanction—was, Şengör argues, unprecedented in the ancient world.

The content of Anaximander's science. To show this was not just philosophical posturing, Şengör enumerates Anaximander's actual scientific claims: that the Earth floats in void without support (because there is no preferred direction in space); that the celestial bodies are holes in a fiery envelope; that fossils found inland indicate ancient oceans; and—startlingly—that early humans gestated inside fish-like creatures before becoming terrestrial. These are recognizably scientific hypotheses in Popper's sense: they make specific empirical predictions.

The 2,600-year lineage. Şengör draws a straight line from Anaximander's method of public refutation to every subsequent advance in natural science. The method has not changed in its essentials: state a claim, expose it to criticism, revise or abandon it if the criticism holds. What changed over the centuries was the range of phenomena the method was applied to, and the sophistication of the instruments used to test claims.

The German museum. The column ends with a practical recommendation: the Bayerische Staatssammlung für Paläontologie und Geologie in Munich, which displays Archaeopteryx fossils relevant to the ongoing evolutionary story the series will tell.

Key ideas

• The critical method was born from a specific social act: Anaximander's public refutation of Thales.
• Anaximander's cosmological and proto-evolutionary hypotheses are falsifiable in principle.
• The lineage of scientific method runs unbroken for 2,600 years back to Miletus.
• Criticism is not merely a psychological virtue but an institutional requirement for science to function.

Key takeaway

Science's deepest root is not any particular discovery but the invention of organized, public criticism as the method for choosing between competing accounts of the world.

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Chapter 4 — Çelişkilere çare aramanın lezzeti: Bilim (The Pleasure of Resolving Contradictions: Science)

Published January 1, 2018. (YouTube: Bölüm 3 — "Einstein, Newton, Galilei")

Central question

How does the confrontation between contradictory theories drive the growth of scientific knowledge?

Main argument

Electromagnetism as a case study. Şengör turns from ancient philosophy to 19th-century physics to show that the best science advances by discovering and then resolving contradictions rather than by accumulating agreeable facts. In 1820, Hans Christian Ørsted discovered that an electric current deflects a compass needle—demonstrating that electricity and magnetism, previously thought unrelated, are connected. André-Marie Ampère then showed the reciprocal relationship; Michael Faraday (1821) demonstrated electromagnetic induction.

Maxwell's synthesis and its consequences. James Clerk Maxwell's equations (1860s) unified electricity, magnetism, and light into a single theoretical framework. The equations yielded a constant: the speed of light. This constant was incompatible with Newton's mechanics, in which velocities are always relative to a frame of reference. The contradiction was not a scandal to be suppressed; it was a signal that something important was missing.

Einstein's 1905 paper. Albert Einstein resolved the contradiction in his special relativity paper, published with—Şengör notes with evident admiration—not a single bibliographic citation (a mark of a mind working from first principles rather than authority). Newtonian mechanics was not refuted; it was revealed as a special case valid at low velocities, subsumed into a more general framework.

The remaining contradiction. Einstein's own general relativity proved incompatible with quantum mechanics (Schrödinger's equation and its successors). As of the time of writing, no resolution has been found. Rather than lamenting this, Şengör presents it as the engine of future science: every unresolved contradiction is a promise of a future breakthrough.

Key ideas

• Scientific progress often begins with the detection of a contradiction between two otherwise successful theories.
• Ørsted–Ampère–Faraday–Maxwell form a chain of discovery driven by successive contradiction-resolution.
• Einstein's relativity subsumed, not destroyed, Newtonian mechanics.
• The current unresolved tension between general relativity and quantum mechanics is the frontier, not a failure.
• The pleasure Şengör refers to in the title is the intellectual satisfaction of resolving a contradiction—a characteristically scientific emotion.

Key takeaway

Contradictions between established theories are not embarrassments but the primary fuel of scientific advancement, as the arc from Maxwell to Einstein demonstrates.

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Chapter 5 — Ben bilgiyle ilgileniyorum (I Am Interested in Knowledge)

Published January 8, 2018. (YouTube: Özel Bölüm — "Fatih Sultan Mehmet, Nuh Tufanı")

Central question

What is the relationship between historical scholarship, scientific inquiry, and the responsibility to follow evidence even when conclusions are culturally uncomfortable?

Main argument

The controversy over Fatih Sultan Mehmed. This column departs from the abstract history of science into a live controversy. Şengör had made remarks—drawing on 15th-century Byzantine sources including Theodoros Spandounes and Gian-Maria Angiolello—suggesting that Fatih Sultan Mehmed's personal religious practice was more syncretic than the received Ottoman nationalist account. Turkish media interpreted this as a claim that the conqueror of Constantinople was non-Muslim. Şengör clarifies here that he reported what historical sources say, not what he personally believes, and that a historian's obligation is to the evidence.

"I am interested in knowledge, not in different branches of science." This striking formulation crystallizes Şengör's intellectual identity. He does not see himself as primarily a geologist, or a historian, or a philosopher—he is a person interested in knowledge wherever it leads, across disciplinary boundaries. This is presented as the right disposition for any scientist: curiosity should precede category.

Ottoman geography corrected. As a side demonstration of the same principle, Şengör presents a calculation of the Ottoman Empire's actual territory at its maximum extent: approximately 6.1 million square kilometers, broken down by region, not the "10 million" figure frequently cited in Turkish popular culture. The correction is offered without polemic—simply as what the evidence shows.

The scientist-citizen. The column raises a question the series will not fully resolve: what is the obligation of a scientist when accurate historical or scientific conclusions conflict with powerful cultural narratives? Şengör's implied answer is that the only honourable course is to report the evidence and accept the social friction.

Key ideas

• Historical scholarship is a form of science when it applies critical method to primary sources.
• The historian's duty is to the evidence, not to the culturally preferred conclusion.
• Intellectual integrity sometimes requires accepting social censure.
• Disciplinary breadth ("knowledge" rather than "a branch of science") is a virtue, not dilettantism.
• Şengör's Ottoman geography correction illustrates that even nationalist myths yield to arithmetic.

Key takeaway

Science's discipline of evidence-over-authority applies equally to natural history and human history—a point this column makes by example rather than argument.

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Chapter 6 — Jeolojide devrim nasıl oldu? (How Did the Revolution in Geology Happen?)

Published January 15, 2018.

Central question

How did the geological sciences transform from a descriptive inventory of rocks into a dynamic, predictive theory of the Earth's interior and surface?

Main argument

The contraction theory. For most of the 19th century, the dominant model of Earth's surface relief was thermal contraction: a cooling planet shrinks, and the wrinkled crust forms mountains just as the skin of a drying apple wrinkles. Eduard Suess's Das Antlitz der Erde (1883–1909) was the masterwork of this tradition, cataloguing structural geology across continents. It was powerful and detailed—and fundamentally wrong about mechanism.

Wegener's continental drift (1912). Alfred Wegener proposed that the continents were once joined in a single landmass (Pangaea) and have since drifted apart. His evidence was the geometric fit of coastlines, matching fossil assemblages on now-separated continents, and structural geology correlations across the Atlantic. The geological establishment largely rejected Wegener's theory because he could not identify a plausible driving mechanism—a lesson Şengör draws about the relationship between observation and mechanism in scientific acceptance.

Paleomagnetic confirmation. In the 1950s, measurements of remanent magnetism in ocean-floor basalts revealed symmetric striping on either side of mid-ocean ridges—a fingerprint of the ocean floor spreading outward from the ridge as new crust was created from below. This was the evidence that finally moved the scientific consensus.

Hess, Wilson, and plate tectonics. Harry Hammond Hess proposed seafloor spreading in 1960–1962; J. Tuzo Wilson synthesized the evidence into the modern theory of plate tectonics. Şengör quotes his assessment that plate tectonics is "the most comprehensive and explanatory theory geology has ever seen"—comparable to evolution in biology: a unifying framework that makes sense of an enormous range of previously disconnected observations.

Key ideas

• The contraction theory was a plausible, evidence-based model that was nevertheless wrong about mechanism.
• Wegener had strong observational evidence but insufficient mechanistic explanation—and was rejected.
• Paleomagnetic striping provided the falsifiable confirmation that compelled acceptance.
• Plate tectonics ranks with Darwinian evolution as one of the great unifying theories of natural science.
• The delay between Wegener (1912) and acceptance (~1965) illustrates the conservatism of scientific communities when mechanism is lacking.

Key takeaway

Plate tectonics arrived not through a single eureka moment but through the accumulation of independent lines of evidence—oceanic, magnetic, seismic—that collectively became impossible to explain without continental motion.

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Chapter 7 — Yaşamın evrim kuramları (Theories of Life's Evolution)

Published January 22, 2018.

Central question

How did early thinkers—Greek, Babylonian, Hindu—conceive of the transformation of living things, and what philosophical obstacles prevented those intuitions from becoming a scientific theory?

Main argument

Mythological origins. Across cultures—Mesopotamian, Hindu, and Greek—creation myths contain episodes of transformation: organisms metamorphose, species arise from primordial matter, humans emerge from simpler forms. Şengör notes these are not proto-evolutionary theories but cosmogonies: explanations of origins rather than mechanisms of change. The distinction matters.

Empedocles and natural selection avant la lettre. The 5th-century BCE philosopher Empedocles proposed that the limbs and organs of animals were originally created separately and combined at random; creatures with well-matched combinations survived and those with mismatched combinations perished. Şengör notes this is recognizably similar in structure to natural selection—random variation followed by differential survival—though it lacks any concept of inheritance or geological time.

Plato's ideal forms as an obstacle. Plato's doctrine that each species is an imperfect copy of a fixed eternal form (eidos) was an active obstacle to evolutionary thinking. If the essence of "horse" is a fixed eternal template, then all horses must conform to that template—variation is mere noise, not the raw material of change. Platonic essentialism persisted in biology until the 20th century.

Aristotle's paradox. Aristotle recognized the logical force of something like natural selection—he explicitly discusses the argument in the Physics—but rejected it in favour of teleological design. Organisms are not shaped by blind differential survival; they develop toward built-in ends (telos). This commitment to purposeful design in nature made Aristotelian biology the dominant framework for nearly two millennia.

Mythology vs. mechanism. The chapter's organizing contrast is between transformation-as-story (myth) and transformation-as-mechanism (science). The former can accommodate any observed pattern; the latter makes predictions that can be tested and falsified.

Key ideas

• Mythological transformation narratives are not scientific theories because they invoke no mechanism.
• Empedocles anticipated natural selection structurally, without genetics or deep time.
• Plato's essentialism directly obstructed evolutionary thinking by making variation philosophically unintelligible.
• Aristotle's teleology was a sophisticated alternative to natural selection, not simple ignorance.
• The key missing ingredients for a scientific theory of evolution were: mechanism (natural selection), heredity (genetics), and time (geological deep time).

Key takeaway

The ancient world had the observations that demanded an evolutionary theory, but lacked the three conceptual ingredients—mechanism, heredity, and deep time—needed to build one.

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Chapter 8 — Babamın ardından: Bir bilim adamı babası nasıl olunur? (After My Father: How to Be a Scientist's Father?)

Published January 29, 2018. Personal tribute essay.

Central question

What kind of parenting philosophy creates a scientist, and what does Şengör's father's death reveal about the relationship between intellectual freedom and unconditional support?

Main argument

Mehmet Asım Şengör (d. January 21, 2018). This is a personal essay written immediately after the death of Şengör's father. It departs from the series' scientific history to reflect on the conditions that make a scientific vocation possible.

Unconditional support for autonomous choice. When young Celal declared his intention to study geology—a field with limited financial prospects in Turkey—his father's response was: "I will support you as long as I have the means." He never pressed his son toward a more lucrative career and never second-guessed the choice. This unconditional support for the child's autonomous intellectual direction is, Şengör argues, the single most important thing a parent of a future scientist can do.

The father as exemplar. Mehmet Asım Şengör is portrayed as a man of remarkable intellectual breadth—precise mathematical ability, capacious memory, deep historical knowledge—combined with personal modesty. He is described as both a committed nationalist (admirer of Atatürk) and a man of faith, holding these apparently contradictory commitments without tension.

Freedom and funding. Şengör notes that his father not only gave emotional support but practical financial support—funding the purchase of rare and expensive scientific books without complaint. The material conditions for intellectual work are part of the message.

Implicit thesis. While not a scientific argument, this chapter makes a point that is continuous with the series: the freedom to follow evidence wherever it leads, to question received wisdom, to pursue an unconventional intellectual path—these require not just personal courage but social and familial support structures. Science does not happen in a social vacuum.

Key ideas

• Parental freedom-of-choice, not direction-of-outcome, is the key parenting variable for scientific development.
• Material support (books, time, financial security) is as important as emotional encouragement.
• A parent can hold religious, nationalist, and pro-science commitments simultaneously without contradiction.
• The essay humanizes the scientist and connects the abstract history of science to a specific individual life.

Key takeaway

Science is enabled by personal freedom; that freedom must be protected by the immediate social environment—family, before culture and institution.

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Chapter 9 — İnsan merkezli düşüncenin doğuşu (The Birth of Human-Centred Thought)

Published February 5, 2018. (YouTube: Bölüm 5)

Central question

How did Greek philosophy, after Aristotle, turn away from natural science toward human-centred concerns, and what were the long-term consequences for the development of scientific thought?

Main argument

The Hellenistic turn inward. After Alexander's conquests, the centre of Greek intellectual life shifted from systematic natural philosophy to ethics and individual conduct. Stoics, Epicureans, Skeptics—all were primarily concerned with how humans should live, not how the natural world worked. This was not intellectual regression but a response to a changed political world: philosophy became a tool for personal survival in an unstable empire.

Lucretius and atomic philosophy. The Roman poet and philosopher Lucretius (99–55 BCE) preserved and extended the Greek atomists' program in De Rerum Natura. His central claim—that all phenomena in the universe, including mind and life, can be explained through the interactions of indivisible material particles without any divine intervention—is the most radical naturalism in the ancient world. Şengör treats Lucretius as a direct intellectual ancestor of modern science's commitment to natural causation.

Saint Augustine and the post-Flood problem. Augustine of Hippo (354–430 CE) faced the biogeographic puzzle that would not be resolved for another fourteen centuries: if all animals descended from those on Noah's Ark, how did kangaroos reach Australia? Augustine's solution—that creatures may have regenerated naturally from the earth after the flood—was, Şengör notes, inadvertently proto-naturalistic. It illustrates how theological reasoning can produce empirically interesting, if unintended, claims.

Protestant literalism as a new obstacle. Martin Luther (1483–1546) insisted on word-for-word scriptural literalism, including the six-day creation account. This was a regression from the more flexible allegorical readings that Catholic and Orthodox traditions had developed over centuries. The consequence was a hardened opposition to evolutionary thinking in Protestant communities that persists in some quarters to the present.

Key ideas

• The Hellenistic philosophical turn toward ethics was a rational response to changed political conditions, not anti-science ideology.
• Lucretius represents the ancient high-water mark of naturalistic explanation.
• Pre-Reformation Christian theology was more accommodating of scientific reasoning than the Protestant literalism that followed.
• Augustine's biogeographic puzzle anticipates Darwin's problem by fourteen centuries.
• The birth of "human-centred thought" created a lasting tension between ethics/theology and natural science.

Key takeaway

The period from Aristotle to the Renaissance was not simply a dark age for science but a complex interplay of Greek naturalism, Roman atomism, and evolving Christian theology—with Protestant literalism introducing a new and lasting source of resistance.

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Chapter 10 — Evrim teorisi Darwin'den çok önce İslam âlimlerinde vardı (Evolution Theory Existed Among Islamic Scholars Long Before Darwin)

Published February 12, 2018.

Central question

Did Islamic medieval scholarship independently develop concepts recognizable as evolutionary thinking, and if so, why did those ideas not develop into a scientific theory?

Main argument

Al-Nazzâm and Al-Cahiz (9th century Basra). Şengör identifies two Basra scholars as the earliest Muslim thinkers to formulate ideas resembling evolution. Al-Cahiz (c. 766–869) in his Kitāb al-Hayawān (Book of Animals) observed that organisms adapt to their environments over time—water snakes in marshes "are transformed by their surroundings"—and described competition for resources among animals, with weaker ones being consumed by stronger ones. This is closer to ecological thinking than natural selection, but it is observational and naturalistic.

Jabir ibn Hayyan (721–815) on spontaneous generation. The alchemist-philosopher Jabir proposed that life arose through natural material processes and speculated that humans could eventually create living beings artificially—a form of philosophical materialism that sits comfortably within the naturalistic tradition.

Rasāʾil Ikhwān al-Safā (10th century). This influential Ismaili encyclopaedia describes a graduated progression from minerals to plants to animals to humans, with each level representing an increase in complexity and awareness. Şengör is careful to note that this is a metaphysical ladder of being, not a historical theory of descent with modification—it describes the structure of creation, not a process of change through time.

Ibn Khaldun (1332–1406) on the great chain. The sociologist-historian Ibn Khaldun presented what Şengör considers the most comprehensive pre-Darwinian framework in the Islamic tradition: a progression from minerals through plants and animals to humans, with each transition representing increased complexity. His observation that "monkeys have intelligence and perception but lack developed reasoning" suggests awareness of a continuum between animal and human cognition.

The missing ingredients. Şengör's comparative assessment is precise: Islamic evolutionary thinking had the observational raw material—adaptation, competition, transformation, gradation—but lacked the three elements needed for a scientific theory: (1) the mechanism of hereditary variation; (2) the geological timeframe provided by uniformitarian geology; and (3) the critical-institutional culture that would have subjected these ideas to systematic testing and revision.

Museum recommendation: Palais de la Découverte, Paris. The column ends with a visit to a museum dedicated to pure science, noting its exhibits on evolution and natural history.

Key ideas

• Al-Cahiz described adaptation and competition in terms that structurally anticipate natural selection.
• Islamic evolutionary thought remained philosophical and metaphysical rather than becoming a testable mechanism.
• The ladder-of-being metaphysics in Ikhwān al-Safā confuses a structural hierarchy with a historical process.
• Ibn Khaldun's framework is the most developmentally sophisticated, but still lacks mechanism and timeframe.
• The absence of uniformitarian geology (deep time) was the decisive missing prerequisite.

Key takeaway

Islamic medieval scholars made genuine and sophisticated contributions to the history of evolutionary thought, but without deep geological time and a mechanism for hereditary variation, the ideas remained philosophical rather than scientific.

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Chapter 11 — Modern jeolojinin kurucusu: Steno (The Founder of Modern Geology: Steno)

Published February 19, 2018.

Central question

How did the correct interpretation of fossils—as the remains of once-living organisms—become established, and why was this step essential for the development of both geology and evolutionary biology?

Main argument

The fossil problem before Steno. For centuries, the identity of fossils was contested. Many ancient and medieval thinkers argued that fossil shells and bones were produced by a "stone-forming power" in rocks (a vis plastica) rather than being actual organisms. If fossils were never alive, they could not be used as evidence for the history of life.

Pierre Belon and comparative anatomy (1555). The column traces the intellectual preparation for Steno: Belon's landmark comparison of bird and human skeletons established that anatomical homology across species was a scientific subject worth pursuing. This set the methodological stage for interpreting fossils in terms of anatomy.

Robert Hooke and Martin Lister. Şengör notes the debate in the Royal Society between Hooke (who argued fossils were organic remains) and Martin Lister (who denied it). The argument was not settled by philosophical argument but by better anatomical evidence.

Niels Stensen / Steno (1638–1686) and the glossopetrae. Steno, a Danish anatomist working in Florence, settled the question in his 1669 work De Solido intra Solidum Naturaliter Contento. He showed that the "tongue stones" (glossopetrae) found embedded in Maltese rocks were anatomically identical to shark teeth—they had the same internal structure. The only explanation was that they were fossilized shark teeth deposited in sediment that subsequently lithified.

Steno's geological principles. In establishing this argument, Steno also laid down the foundational principles of stratigraphy: (1) the principle of original horizontality (sedimentary layers are deposited horizontally); (2) the principle of superposition (lower layers are older); (3) the principle of lateral continuity (layers extend laterally until they thin out or hit a barrier). These principles made the geological column—the organized record of Earth's history—possible.

Evliya Çelebi's observation. Şengör adds a note of Ottoman intellectual history: the 17th-century traveller Evliya Çelebi recorded observations of fossilized marine creatures in Central Asian plains, demonstrating that awareness of fossils was not exclusively European.

Key ideas

• The organic origin of fossils was not self-evident; it required careful anatomical comparison to establish.
• Steno's shark-teeth proof established the organic origin of at least one class of fossils definitively.
• The principles of stratigraphy (horizontality, superposition, continuity) were by-products of Steno's fossil investigation.
• Stratigraphy made deep geological time conceivable for the first time.
• Deep geological time was the prerequisite for Darwin's evolutionary theory.

Key takeaway

Steno founded both the correct interpretation of fossils and the stratigraphic principles that make reading Earth's history possible—making him an indispensable precursor to Darwin.

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Chapter 12 — Her canlıya önce cins sonra tür adı (Every Living Thing: Genus First, Then Species Name)

Published February 26, 2018.

Central question

How did the 17th and 18th centuries build the conceptual and taxonomic apparatus—binomial nomenclature, classification, the idea of species as mutable—that Darwin would need?

Main argument

Leibniz's private evolutionism. Gottfried Wilhelm von Leibniz (1646–1716) privately theorized that organisms transform over time, but chose not to publish these views for fear of religious persecution. This illustrates the social constraints on pre-Enlightenment naturalistic thinking: the ideas existed, but the institutional culture could not safely host them.

Linnaeus and binomial nomenclature. Carl von Linné (Linnaeus, 1707–1778) introduced the system of naming every organism with a genus and species name in Latin—Homo sapiens, Felis catus. This was not merely administrative convenience; it encoded the claim that species have stable, definable identities and that organisms can be systematically grouped by shared characteristics. Şengör notes the paradox: Linnaeus believed species were fixed and divinely created, yet his classification system provided the structural framework within which Darwin would demonstrate that species were not fixed.

Buffon's "degeneration theory." Georges-Louis Leclerc, Comte de Buffon (1707–1788), proposed what he called "degeneration"—the idea that organisms in different environments diverged from common ancestral types. The donkey, in his view, was a degenerated horse; the ape a degenerated human. This is not natural selection, but it is the first major European proposal that species can change into other species under environmental influence.

Lamarck's inheritance of acquired characteristics. Jean-Baptiste Lamarck (1744–1829) proposed the first systematic theory of evolutionary mechanism: organisms actively acquire adaptations through use and effort during their lifetimes, and these acquired characteristics are inherited by offspring. The famous example is the giraffe stretching its neck to reach higher leaves and passing its slightly longer neck to its progeny. Lamarck's mechanism was wrong (acquired characters are not heritable in the Darwinian sense), but his contribution was to establish that evolution was not merely possible but explicable by a natural mechanism—even if the wrong one.

Key ideas

• Leibniz had evolutionary intuitions but could not publicly express them.
• Linnaean taxonomy encoded species stability while simultaneously providing the framework within which instability would be demonstrated.
• Buffon made geographic variation and inter-species relatedness thinkable.
• Lamarck's contribution was the claim that evolution had a discoverable natural mechanism, regardless of whether his specific mechanism was correct.
• The 18th century built the conceptual vocabulary Darwin needed.

Key takeaway

By the end of the 18th century, European naturalists had the taxonomy (Linnaeus), the idea of species transformation (Buffon), and the demand for a natural mechanism (Lamarck)—the three conceptual prerequisites for Darwin's synthesis.

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Chapter 13 — Bu bir deneydi ama özür dilerim (This Was an Experiment, But I Apologize)

Published March 5, 2018. Topic: Ptolemy's Geography and historical cartography.

Central question

How was Ptolemy's ancient geographic knowledge preserved, lost, recovered, and restored—and what does its Ottoman afterlife reveal about the relationship between Islamic scholarship and classical learning?

Main argument

A journalistic experiment. Şengör opens by confessing that a previous column used a deliberately inflammatory word to test whether Turkish media would report on a historically important manuscript or focus on the provocation. The media focused on the provocation. The apology is genuine; the lesson about media incentives is implicit.

Ptolemy's Geography. Claudius Ptolemy (2nd century CE) produced not only an astronomical system but a geographic guide assigning latitude and longitude coordinates to thousands of locations across the known world. This was the first systematic attempt to create a geometrically consistent map of the Earth's surface—the ancestor of all modern cartography.

The manuscript's journey. Ptolemy's Geography was preserved in Islamic scholarship during the European Middle Ages, then re-entered European circulation via Byzantine monasteries in the 14th and 15th centuries. Şengör traces the manuscript's subsequent fate: it nearly perished in the chaos of the late Ottoman period but was rescued during Atatürk's 1926 inventory of surviving manuscripts. A modern critical edition and facsimile was produced under Prof. Alfred Stückelberger and published in the 2000s by Boyut Yayınları.

Fatih Sultan Mehmed and the restoration. After the conquest of Constantinople in 1453, Fatih Sultan Mehmed commissioned Turkish translations and restorations of the Geography—part of his broader project of incorporating Byzantine and classical learning into Ottoman intellectual culture. This is a concrete case of Ottoman cultural continuity with the classical tradition.

Cartography as science. The underlying scientific point is that geography requires a coordinate system—an abstract mathematical framework imposed on the physical world. Ptolemy's latitude/longitude grid was a genuine scientific achievement: it created a language for stating geographic claims precisely enough to be tested against observation.

Key ideas

• Ptolemy's coordinate-based geography is the foundation of modern cartography.
• Classical learning was preserved and transmitted through Islamic scholarship before re-entering European scientific culture.
• Ottoman rulers, including Mehmed II, actively engaged with and commissioned translations of classical science.
• The survival of important manuscripts depends as much on political contingency as on scholarly value.
• Cartography is a science because it makes falsifiable predictions about location.

Key takeaway

The history of Ptolemy's Geography illustrates that the transmission of scientific knowledge is never automatic—it requires active custodianship and often crosses cultural and linguistic boundaries in unexpected ways.

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Chapter 14 — Üç bilim dalının kurucusu: Cuvier (Founder of Three Scientific Disciplines: Cuvier)

Published March 12, 2018.

Central question

How did Georges Cuvier establish comparative anatomy, vertebrate palaeontology, and biostratigraphy—and what was his contribution to, and resistance to, evolutionary thinking?

Main argument

Cuvier's principle of the correlation of organs. Georges Cuvier (1769–1832) proposed that an animal's organs form a functionally integrated system: the digestive system requires a particular kind of teeth, which require a particular jaw structure, which implies a particular skull shape. His famous formulation was: "If you have hooves, you cannot have cutting teeth." This principle—the correlation of organs—allowed him to reconstruct entire extinct animals from a handful of fossil bones.

Vertebrate palaeontology. Cuvier's application of this principle to the Paris gypsum deposits (studied with Alexandre Brongniart) produced the first systematic descriptions of extinct mammals—Palaeotherium, Anoplotherium—from fossil remains alone. This founded vertebrate palaeontology as a discipline.

Biostratigraphy. Cuvier and Brongniart's Paris basin studies also showed that different rock strata contained different assemblages of fossil species, and that the same assemblages appeared consistently in the same stratigraphic position across wide areas. This founded the use of fossils to correlate rocks and date geological events—biostratigraphy—an indispensable tool in modern geology.

Catastrophism vs. uniformitarianism. Cuvier explained the extinction of fossil species through catastrophism: periodic global catastrophes wiped out existing faunas, which were then replaced by new creations or by migration from unaffected areas. This was not simply resistance to change; it was a scientifically serious position given the evidence available to him. Şengör presents Cuvier as a brilliant scientist who reached the wrong theoretical conclusion for understandable reasons.

Cuvier's opposition to Lamarck. Cuvier vigorously opposed Lamarck's transformism, partly on functional grounds (a fish's entire organ system is adapted to water; you cannot incrementally modify it toward a terrestrial system without the animal failing at each intermediate stage), and partly on the fossil evidence (successive faunas showed discontinuities, not gradations). His opposition delayed the acceptance of evolutionary ideas in France for decades.

Key ideas

• The correlation of organs principle made systematic palaeontology possible.
• Cuvier's Paris basin work founded both vertebrate palaeontology and biostratigraphy.
• Catastrophism was a scientifically defensible interpretation of the fossil record before uniformitarian geology provided the full timescale.
• Cuvier's opposition to evolution was not mere conservatism; it was motivated by real functional challenges that Darwin would later address.
• Cuvier illustrates that a scientist can found three disciplines while being wrong on the most important theoretical question of the day.

Key takeaway

Cuvier's work established the technical tools—fossil reconstruction, stratigraphic correlation—that Darwin's theory would require, even as Cuvier himself refused to accept evolution.

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Chapter 15 — Pek çok yanlış yapmış bir bilim devi: Stephen William Hawking (A Scientific Giant Who Made Many Mistakes: Stephen William Hawking)

Published March 19, 2018. Written as an obituary following Hawking's death on March 14, 2018.

Central question

What was Stephen Hawking's actual scientific contribution, as distinct from his celebrity, and what does his career reveal about the relationship between theoretical physics, popular science, and the management of error?

Main argument

Hawking radiation. Şengör identifies Hawking's single most important scientific contribution as his 1974 theoretical prediction that black holes are not entirely black—they emit thermal radiation (now called Hawking radiation) due to quantum effects at the event horizon. This brought together general relativity and quantum mechanics in a single prediction, though it has never been directly confirmed by observation.

Singularity theorems. Working with Roger Penrose, Hawking proved (early 1970s) that if general relativity is correct and if matter satisfies certain energy conditions, then singularities—points of infinite density—must exist inside black holes and existed at the Big Bang. This was a major contribution to theoretical cosmology.

The title's "many mistakes." Şengör is specific about Hawking's errors: his initial claim that information is destroyed when matter falls into a black hole (the "information paradox") was retracted in 2004; several other cosmological proposals have not been confirmed or have been contradicted. The title's point is not dismissive—Şengör's admiration for Hawking is evident—but programmatic: a great scientist is judged by the quality of their questions and methods, not by an unblemished record.

A mind recreating a universe. Şengör describes Hawking's intellectual achievement with an analogy to Mozart: as Mozart could construct a complete symphony in his mind without hearing it, Hawking reconstructed an entire cosmos through mathematical reasoning while his body became progressively immobile. This is the "magic of science" in its most compressed form.

Popular science and its costs. A Brief History of Time (1988) made Hawking the most famous scientist of his era. Şengör notes, not altogether approvingly, that Hawking's later pronouncements—on alien intelligence, on the dangers of AI, on the inevitability of humanity's extinction—were made with the authority of a physicist but on topics where that authority did not straightforwardly extend. The celebrity scientist is a social phenomenon with its own distorting effects.

Key ideas

• Hawking radiation is Hawking's most important and original contribution.
• The singularity theorems (with Penrose) established rigorous results within general relativity.
• Making mistakes at the frontier is normal for scientists working on genuinely hard problems.
• Celebrity can amplify a scientist's voice on topics outside their competence.
• Hawking's career exemplifies both the power and the limits of theoretical physics conducted independently of direct experiment.

Key takeaway

Hawking's legacy is a demonstration that great scientific work and significant errors can coexist in the same career—and that the willingness to make bold, falsifiable predictions is more valuable than an unblemished record.

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Chapter 16 — Bilim dünyasında bir yıldız daha kaydı: Kevin Burke (Another Star Faded in the Scientific World: Kevin Burke)

Published March 26, 2018. Obituary for Kevin Burke (1929–2018).

Central question

What does the career of Kevin Burke—geologist, plate tectonics pioneer, and Şengör's doctoral supervisor—reveal about how transformative scientific ideas are built and transmitted?

Main argument

Burke's polymath career. Kevin Charles Antony Burke (born November 13, 1929 in London; died March 21, 2018 near Boston) worked in East Africa, South Korea, Jamaica, and Nigeria before settling in North America. He co-founded a geology department at SUNY Albany with John Frederick Dewey, later directed the Institute for Geophysics at Houston, and ended his career at MIT with the Crosby Fellowship. He authored approximately 400 scientific papers.

Contributions to plate tectonics. Burke was among the generation of geologists who built out the plate tectonics framework in the late 1960s and early 1970s—the "heroic generation" that converted Wegener's heresy into geological orthodoxy. His particular contributions were to the geology of Africa and to the theory of triple junctions (the points where three tectonic plates meet).

Burke's intellectual disposition. Şengör quotes Burke's principle: he never refused offered work by claiming "that's not my specialty." This radical intellectual generalism—accepting any problem as worth engaging with—is presented as the right disposition for a scientist at the frontier of a newly unified discipline.

The teacher–student relationship. This is a personal column: Şengör was Burke's doctoral student, and the tribute is warm and specific. The column argues implicitly that the transmission of scientific method from teacher to student—through example, through collaboration, through the shared experience of doing science—is as important to the progress of knowledge as any published result.

Key ideas

• Burke's career spanned five continents and contributed directly to plate tectonics' development.
• Intellectual breadth (no refused problems) is a scientific virtue at disciplinary frontiers.
• The teacher–student relationship is a primary channel of methodological transmission in science.
• Plate tectonics was built by a specific generation of geologists working in the 1965–1975 period.
• Obituary-writing is also science history—preserving the human record of how knowledge grows.

Key takeaway

Scientific revolutions are made by communities, not lone geniuses; Kevin Burke's career illustrates how individual breadth, institutional collaboration, and the teacher–student bond compound to build a new paradigm.

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Chapter 17 — Bilimde tekdüzecilik (Uniformitarianism in Science)

Published April 9, 2018.

Central question

What is uniformitarianism, how did Hutton and Lyell establish it, and why was it the essential precondition for Darwin's theory of evolution?

Main argument

The ancient Greek insight. Şengör traces uniformitarianism—the principle that the natural laws governing geological processes today are the same as those that governed them in the past—back to the ancient Greeks, who recognized that there is no fundamental difference between yesterday's natural events and today's. The insight was dormant for centuries.

James Hutton (1726–1797): "no vestige of a beginning, no prospect of an end." The Scottish geologist James Hutton revived and formalized uniformitarianism in Theory of the Earth (1788). Studying exposed rock strata in Scotland, he argued that the processes visible today—erosion, deposition, volcanic activity—are the same as those that produced all geological formations. The implication was staggering: to produce the observed thicknesses of sedimentary rock at observed deposition rates required not thousands but millions of years.

Charles Lyell (1797–1875) and the formalization. Lyell's Principles of Geology (1830–1833) systematized Hutton's insight into the formal doctrine of uniformitarianism and presented an overwhelming accumulation of evidence for it. The three volumes of Lyell were the first scientific book Darwin took with him on the Beagle voyage—and it is easy to see why.

George Poulett-Scrope and volcanic timescales. Şengör introduces Poulett-Scrope's studies of extinct volcanoes in central France, which showed that the erosion of volcanic landscapes required millions of years under any reasonable estimate of erosion rates. This was concrete field evidence, not just theoretical argument.

The link to Darwin. Uniformitarianism provided evolutionary biology with its essential prerequisite: deep geological time. Natural selection requires enormous time to produce significant change from small hereditary variations. Without the millions of years that uniformitarian geology made available, natural selection is implausible. Şengör states this link explicitly: Lyell gave Darwin his timescale.

Key ideas

• Uniformitarianism holds that past and present geological processes operate under the same natural laws.
• Hutton's "no vestige of a beginning" was the first rigorous statement of geological deep time.
• Lyell's Principles of Geology was Darwin's constant companion on the Beagle.
• Scrope's volcanic studies provided field quantification of geological timescales.
• Deep time is the sine qua non of evolutionary theory: without it, natural selection cannot produce observed biodiversity.

Key takeaway

Uniformitarianism is the conceptual bridge between geology and evolution: by establishing deep geological time, Hutton and Lyell made Darwin's theory not merely possible but necessary.

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Chapter 18 — Doğal seçme kuramı ve "Türlerin Kökeni" (Natural Selection Theory and "The Origin of Species")

Published April 16, 2018.

Central question

How did Darwin and Wallace independently arrive at natural selection, and what did Darwin's Origin of Species actually establish—and fail to establish?

Main argument

The convergence of Darwin and Wallace. Charles Darwin (1809–1882) gathered evidence during the Beagle voyage (1831–1836) but spent more than twenty years consolidating his theory before publishing. Alfred Russel Wallace (1823–1913), working independently in the Malay Archipelago, sent Darwin a manuscript in 1858 describing essentially the same theory of natural selection. The joint announcement at the Linnean Society in 1858—and Darwin's Origin in 1859—are the founding documents of evolutionary biology.

The three pillars of modern evolutionary theory. Şengör presents the modern synthesis in a memorable formulation: the theory of evolution rests on three interlocking pillars:

1. Darwin–Wallace natural selection — differential reproduction based on heritable variation.
2. Mendel's genetics — the mechanism of inheritance, establishing how variations are transmitted.
3. De Vries's mutation theory — the source of new heritable variation.

Darwin had the first pillar but was ignorant of the second and third. He knew variations occurred and were inherited, but did not know how—he even briefly entertained Lamarckian ideas about the inheritance of acquired characters.

What the Origin did not explain. The title of Darwin's book is On the Origin of Species, but Şengör notes with precision that the book does not actually explain the origin of new species—it explains the divergence and adaptation of populations given heritable variation. The origin of new hereditary variation (mutation) had to wait for Hugo de Vries (1890s–1900s); the mechanism of heredity (Mendelian genetics) was published by Mendel in 1866 but ignored until 1900.

Anaximander revisited. The column loops back to the series' opening: Anaximander, in the 6th century BCE, proposed that early humans gestated inside fish-like creatures—an intuition about human descent from aquatic ancestors that was 2,500 years ahead of its time. Darwin confirmed, with mechanism, what Anaximander had glimpsed without one.

Key ideas

• Natural selection is differential reproduction based on heritable variation—not "survival of the fittest" in a crude sense.
• Darwin and Wallace discovered the first pillar independently; Mendel and De Vries supplied the second and third posthumously (for Darwin).
• The Origin of Species explains adaptation and divergence but not the ultimate origin of hereditary variation.
• The modern synthesis (1930s–1940s) fused all three pillars into the current framework.
• The series circles back to Anaximander, showing that the story of evolution is also the story of 2,600 years of scientific method.

Key takeaway

Darwin's Origin was the beginning, not the end, of evolutionary theory: it provided the mechanism (selection) but left the sources of hereditary variation to be explained by Mendel and De Vries.

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Chapter 19 — Ara tür diye bir sorun var mı? (Is There Really a Problem with Intermediate Species?)

Published April 23, 2018. Final column in the series.

Central question

Does the alleged absence of "missing links" in the fossil record constitute a serious objection to evolutionary theory?

Main argument

The creationist objection. The argument from missing links holds that if species gradually evolved from one another, the fossil record should be filled with transitional forms—and since it appears not to be, evolution must be false. This argument has been repeated since Darwin's own time and remains a popular objection.

Darwin's original answer. Darwin acknowledged the incompleteness of the fossil record in The Origin of Species and offered two responses: (1) fossilization is a rare and improbable process—most organisms are never fossilized; (2) the record we have is therefore a tiny, non-representative sample of the organisms that have existed.

Archaeopteryx (1861). Two years after the Origin, a fossil was discovered in the Solnhofen limestone deposits of Bavaria that spectacularly bridged the gap between non-avian dinosaurs and birds: Archaeopteryx, with feathers and wings like a bird but teeth, clawed fingers, and a bony tail like a theropod dinosaur. Şengör presents this discovery as temporarily silencing the missing-link objection—it showed exactly the kind of transitional form the objection claimed did not exist.

Evolution as continuous: every organism is a transition. Şengör's main argumentative move is to dissolve the concept of "missing link" altogether. Evolution is not a series of discrete species-jumps but a continuous process of population change. Every living organism is an intermediate form between its ancestors and its descendants. The concept of a "missing link" is a category error that treats species as fixed types rather than as snapshots of a continuously changing population.

Differential mutation rates. Şengör adds a quantitative dimension: mutation rates vary enormously across organisms. Bacteria complete generations in hours and evolve measurably in days; large mammals require hundreds of thousands of years to show comparable genetic divergence. This means that the fossil record, even if complete, would show very different densities of transitional forms for different lineages.

The closing argument. Denying the existence of intermediate species, Şengör concludes, demonstrates "simple ignorance"—not of the fossil record, but of what evolutionary theory actually predicts. The series ends where it began: with the insistence that science must be engaged with as it actually is, not as a caricature.

Key ideas

• Fossilization is rare; the fossil record is a highly incomplete sample of past life.
• Archaeopteryx is the canonical transitional fossil bridging non-avian dinosaurs and birds.
• The concept of "missing link" assumes species are fixed types—a pre-Darwinian assumption evolution itself denies.
• Every organism in a lineage is a transitional form between its ancestors and descendants.
• Differential mutation rates explain why transitional density varies across lineages.

Key takeaway

The "missing links" objection collapses under the recognition that evolution is a continuous process—there are no discrete "links" to be missing, only an incomplete fossil record of an unbroken lineage.

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The book's overall argument

1. Chapter 1 (Bilimin modern aşamalarıyla tanışalım) — Establishes the series' foundational claim: science is the only reliable knowledge-producing method, defined by Popperian falsifiability, and distinguished from pseudoscience by its openness to refutation.

2. Chapter 2 (İnsanın tek silahı: Akıl) — Grounds the case for science in evolutionary biology: reason is humanity's adaptive core, but reason's power depends on whether it is institutionalized as criticism or frozen as dogma.

3. Chapter 3 (Doğruyu aramanın yolu: Eleştiri) — Identifies the specific invention that enabled science: Anaximander's public refutation of Thales, establishing organized criticism as the method for adjudicating between competing accounts of the world.

4. Chapter 4 (Çelişkilere çare aramanın lezzeti: Bilim) — Shows the method in action in 19th-century physics: the Ørsted–Maxwell–Einstein chain demonstrates how contradictions between theories drive advances, from electromagnetism to relativity.

5. Chapter 5 (Ben bilgiyle ilgileniyorum) — Applies the scientific attitude to history and cultural controversy, arguing that the obligation to follow evidence applies to human history as much as to natural history.

6. Chapter 6 (Jeolojide devrim nasıl oldu?) — Traces the revolution in geology from contraction theory to plate tectonics, illustrating how a unifying theory (like evolution in biology) transforms a descriptive discipline into a predictive one.

7. Chapter 7 (Yaşamın evrim kuramları) — Surveys ancient and medieval evolutionary intuitions, explaining precisely what ingredients were missing (mechanism, heredity, deep time) that prevented them from becoming scientific theories.

8. Chapter 8 (Babamın ardından) — Personalizes the scientific vocation: intellectual freedom requires not only courage but familial and social support structures that protect the freedom to follow evidence.

9. Chapter 9 (İnsan merkezli düşüncenin doğuşu) — Traces the complex interplay of Hellenistic philosophy, Roman atomism, and early Christian theology, showing that the path from ancient science to modern science was not linear.

10. Chapter 10 (Evrim teorisi Darwin'den çok önce İslam âlimlerinde vardı) — Documents sophisticated Islamic medieval evolutionary thinking, explaining why it remained philosophical rather than scientific (no mechanism, no deep time, no critical institutional culture).

11. Chapter 11 (Modern jeolojinin kurucusu: Steno) — Establishes Steno's double contribution: the organic origin of fossils and the stratigraphic principles that made geological deep time conceivable.

12. Chapter 12 (Her canlıya önce cins sonra tür adı) — Traces the 18th-century construction of the conceptual apparatus Darwin needed: Linnaean taxonomy, Buffon's transformism, and Lamarck's demand for a natural mechanism.

13. Chapter 13 (Bu bir deneydi ama özür dilerim) — Uses Ptolemy's Geography to show that the transmission of scientific knowledge is fragile, culturally contingent, and dependent on active custodianship across civilizational borders.

14. Chapter 14 (Üç bilim dalının kurucusu: Cuvier) — Shows how Cuvier's catastrophism, though wrong, contributed the technical tools (comparative anatomy, biostratigraphy) that evolutionary biology required.

15. Chapter 15 (Pek çok yanlış yapmış bir bilim devi: Stephen William Hawking) — Uses Hawking's career to argue that error at the frontier is normal, and that the willingness to make bold, falsifiable predictions is more scientifically valuable than an unblemished record.

16. Chapter 16 (Bilim dünyasında bir yıldız daha kaydı: Kevin Burke) — Illustrates how scientific revolutions are built by communities through teacher-student transmission, intellectual generalism, and sustained collaborative effort.

17. Chapter 17 (Bilimde tekdüzecilik) — Establishes uniformitarianism—geological deep time—as the conceptual bridge between geology and evolutionary biology, showing how Hutton and Lyell gave Darwin his timescale.

18. Chapter 18 (Doğal seçme kuramı ve "Türlerin Kökeni") — Presents Darwin's Origin not as a complete theory but as the first pillar of a three-part synthesis (selection, genetics, mutation) that took another century to complete.

19. Chapter 19 (Ara tür diye bir sorun var mı?) — Closes the series by dissolving the "missing link" objection, returning to the series' opening theme: popular resistance to science depends on misunderstanding what scientific theories actually claim.

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Common misunderstandings

Misunderstanding: Science is a collection of established facts.

Science is a method, not a collection of facts. The specific claims science makes are provisional and revisable. What is stable is the method—criticism, falsifiability, systematic testing—not the conclusions at any given moment. Newton's mechanics were stable for two centuries and are still used in engineering; they were nevertheless revised by Einstein. This does not make Newton wrong; it makes science work.

Misunderstanding: Darwin's theory is "just a theory."

In everyday Turkish (and English), "theory" means a guess. In science, a theory is a systematically organized set of explanations supported by extensive evidence. Evolutionary theory has the same status as gravitational theory or plate tectonic theory—all are "theories" in the scientific sense, and all are as well-established as anything in natural science. The word does not imply doubt; it implies systematic explanation.

Misunderstanding: Islamic scholars (or the ancient Greeks) anticipated Darwin, so Darwin's contribution was minor.

Anticipation without mechanism is not a scientific theory. Al-Cahiz, Empedocles, and Ibn Khaldun observed patterns consistent with evolution and described transformation, but none proposed a testable mechanism for hereditary change. The key contribution of Darwin (and Mendel and De Vries) was not the observation that organisms change but the mechanism—natural selection on heritable variation—that explains how and why.

Misunderstanding: The absence of "missing links" falsifies evolution.

This argument presupposes that species are fixed types with sharp boundaries, which is the pre-Darwinian view that evolution itself denies. On the evolutionary view, every organism in a lineage is a transitional form. The fossil record is incomplete (most organisms are never fossilized), but what it contains—including Archaeopteryx—is consistent with evolution.

Misunderstanding: Science and religion are necessarily in conflict.

Şengör's argument is more specific: the critical method is incompatible with unchallengeable authority, regardless of whether that authority is religious or secular. Medieval Islamic and Catholic scholars engaged productively with natural philosophy. Protestant literalism introduced a specific and unusual form of authority-claim (word-for-word scriptural inerrancy) that made conflict with natural science almost inevitable for those particular claims. Science does not require atheism; it requires that all claims, including religious ones, remain open to evidence-based revision.

Misunderstanding: Great scientists are infallible.

Both Hawking and Cuvier—two of the book's scientific exemplars—are praised precisely for the quality of their errors. Cuvier was brilliantly wrong about catastrophism. Hawking was spectacularly wrong about information destruction in black holes. The book argues that the willingness to make specific, testable (and therefore potentially falsifiable) claims is itself the mark of good science—and that being wrong on the frontier is more valuable than being cautiously right at its edges.

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Central paradox / key insight

The central paradox of Bilimin Büyüsü is that humanity's most powerful cognitive tool—the self-correcting critical method—is also the one most consistently suppressed by the social structures humanity builds to preserve knowledge.

Every civilization that has produced great scientific results has done so by institutionalizing the right to criticize received opinion: the Milesian polis, the Islamic translation movement, Renaissance Europe, and modern research universities. Yet the same civilizations, through religious authority, national mythology, academic prestige, and social conservatism, also work to calcify the results of criticism into new untouchable dogmas—and the cycle begins again.

"Throughout history, pseudoscience—including prophecy, astrology, sorcery, and occult studies—has been presented to people as legitimate science." — Şengör

The book's deepest claim is that this is not an accident or an aberration but the permanent structural condition of intellectual life. The "magic of science" is that the critical method keeps escaping from each new cage humanity builds for it—from Anaximander criticizing Thales to Einstein citing no authorities in his 1905 paper to Darwin publishing a theory he had sat on for twenty-two years while the world's foremost geologist (Lyell) begged him to release it. The escape is never final; the cage is always rebuilt. The scientist's task, and the citizen's, is to keep breaking it open.

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Important concepts

Falsifiability (yanlışlanabilirlik)

Karl Popper's criterion for distinguishing scientific from non-scientific claims: a statement is scientific if and only if it is possible to specify in advance an observation that would show it to be false. A claim that can accommodate any observation—that can never be shown wrong—is not scientific regardless of how many people believe it.

Critical method (eleştiri yöntemi)

The practice, attributed by Şengör to Anaximander, of subjecting all claims to public scrutiny and organized refutation. It is not merely skepticism (doubting claims) but an institutional procedure: claims must be stated precisely enough to be evaluated, and the social environment must permit and encourage their refutation.

Uniformitarianism (tekdüzecilik)

The geological principle that the natural laws governing geological processes are constant through time. Today's erosion rates, volcanic activity, and sedimentation are governed by the same physics as those of one billion years ago. Formalized by Hutton and Lyell, uniformitarianism established geological deep time and made Darwinian evolution scientifically plausible.

Deep time (derin zaman)

The concept that Earth's history extends over hundreds of millions (now known to be billions) of years. Established by Hutton's and Lyell's uniformitarian geology. Without deep time, natural selection cannot produce observed biodiversity; the evolutionary timescale requires geological epochs, not biblical millennia.

Natural selection (doğal seçim)

Darwin and Wallace's mechanism of evolution: in any population with heritable variation, individuals whose inherited traits improve their reproductive success will, over generations, leave more descendants. Trait frequencies in the population therefore shift over time—"selection" is differential reproductive success, not deliberate choice.

Plate tectonics (levha tektoniği)

The modern theory of Earth's lithosphere: the outer shell is divided into rigid plates that move relative to each other, driven by convection in the underlying mantle. Plates converge, diverge, or slide past each other, producing earthquakes, volcanoes, mountain ranges, and ocean basins. Described by Şengör as the most powerful and comprehensive theory in the history of geology.

Correlation of organs (organ korelasyonu)

Cuvier's principle that the organs of an animal form a functionally integrated system: the form of any one organ constrains the possible forms of others. A carnivore's teeth imply a carnivore's gut; hooves imply a herbivore's molars. The principle allowed Cuvier to reconstruct extinct animals from fragmentary fossil remains.

Biostratigraphy (biyostratigrafi)

The use of fossil assemblages to correlate rock layers and establish their relative ages. Different strata consistently contain different fossil species; identifying the same fossil assemblage in two widely separated rock sections allows them to be correlated as contemporaneous. Founded by Cuvier and Brongniart through their Paris basin studies.

Modern evolutionary synthesis (modern evrim sentezi)

The integration of Darwin–Wallace natural selection, Mendelian genetics, and De Vries mutation theory into a single coherent framework (achieved largely in the 1930s–1940s). The synthesis explains not just adaptation and divergence but the origin of new heritable variation and the mechanism of inheritance.

Pseudoscience (sözde bilim)

Claims that mimic the prestige of science without accepting the discipline of falsifiability. Astrology, prophecy, and occult practices are Şengör's primary examples: their predictions are systematically vague enough to accommodate any outcome, making them immune to refutation—and therefore non-scientific by definition.

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References and Web Links

Primary book and edition information

• Şengör, A. M. Celal. Bilimin Büyüsü. İnkılap Kitabevi, Istanbul, 2019. ISBN 9789751039422. 160 pages.
  • Publisher page — İnkılap Kitabevi
  • Goodreads entry

Original Habertürk columns (in publication order)

These are the primary sources; the book collects them in this sequence.

• Bilimin modern aşamalarıyla tanışalım (11 December 2017)
• İnsanın tek silahı: Akıl (18 December 2017)
• Doğruyu aramanın yolu: Eleştiri (25 December 2017)
• Çelişkilere çare aramanın lezzeti: Bilim (1 January 2018)
• Ben bilgiyle ilgileniyorum (8 January 2018)
• Jeolojide devrim nasıl oldu? (15 January 2018)
• Yaşamın evrim kuramları (22 January 2018)
• Babamın ardından (29 January 2018)
• İnsan merkezli düşüncenin doğuşu (5 February 2018)
• Evrim teorisi Darwin'den çok önce İslam âlimlerinde vardı (12 February 2018)
• Modern jeolojinin kurucusu: Steno (19 February 2018)
• Her canlıya önce cins sonra tür adı (26 February 2018)
• Bu bir deneydi ama özür dilerim (5 March 2018)
• Üç bilim dalının kurucusu: Cuvier (12 March 2018)
• Pek çok yanlış yapmış bir bilim devi: Stephen William Hawking (19 March 2018)
• Bilim dünyasında bir yıldız daha kaydı: Kevin Burke (26 March 2018)
• Bilimde tekdüzecilik (9 April 2018)
• Doğal seçme kuramı ve 'Türlerin Kökeni' (16 April 2018)
• Ara tür diye bir sorun var mı? (23 April 2018)

Author background

• Celâl Şengör — Wikipedia (English)
• Celal Şengör — Habertürk author page

Key scientific works discussed in the book

• Darwin, Charles. On the Origin of Species. John Murray, London, 1859.
• Lyell, Charles. Principles of Geology (3 vols). John Murray, London, 1830–1833.
• Wegener, Alfred. Die Entstehung der Kontinente und Ozeane. Vieweg, 1915. [English: The Origin of Continents and Oceans]
• Steno, Niels. De Solido intra Solidum Naturaliter Contento. Stellae, Florence, 1669.
• Ptolemy, Claudius. Geographia (2nd century CE).

YouTube companion videos

The columns were also broadcast as a weekly video series on Habertürk's YouTube channel.

• Celal Şengör ile Bilim — YouTube playlist
• Bölüm 3 (1 January 2018) — Einstein, Newton, Galilei
• Özel Bölüm (8 January 2018) — Fatih Sultan Mehmet, Nuh Tufanı
• Bölüm 5 (5 February 2018) — İnsan Merkezli Düşüncenin Doğuşu