[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"article-detail":3},{"lang":4,"article":5,"alternate":19,"related":24,"latest":33},"en",{"id":6,"slug":7,"title":8,"content":9,"summary":10,"thumbnail":11,"metaDescription":12,"metaKeywords":13,"created":14,"modified":14,"author":15,"authorEn":15,"categoryId":16,"commentCount":17,"thumbnailToContent":18},12755,"evolution-white-cliffs-dover-tqbm","How Did Tiny Algae Build the White Cliffs of Dover?","\u003Cp style=\"margin:0 0 18px;\">I finally understood evolution. No joke.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">I always knew about evolution, and I never doubted it. Yet I still found it miraculous that a pile of inorganic matter, after billions of years of evolution, became us — beings with consciousness. Then I learned about the White Cliffs of Dover.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Thirty stories high, stretching for 13 kilometers of continuous white cliff.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Yes, you read that right: the cliffs are \u003Cstrong>made by living things\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>A Cliff Built by Single Cells\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">About 70 million years ago, what is now southern England was a shallow sea.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">The surface teemed with a single-celled marine alga called \u003Cstrong>coccolithophore\u003C\u002Fstrong>. Each one is a single cell — but it builds itself a beautiful shell of calcium carbonate. The shell is not one solid piece: it is assembled from many tiny, ornate discs called \u003Cstrong>coccoliths\u003C\u002Fstrong>.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">When these tiny creatures died, the process ran:\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">coccolithophore → calcium carbonate shell → sink to the seafloor → white ooze → compaction → lithification → today's chalk → the White Cliffs of Dover\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">A single coccolith is only about 3–5 μm across. To picture it: the diameter of one human hair spans dozens of coccoliths side by side.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">The sediment accumulated at just 0.5 millimeters per year. Yet it produced a biomineral structure on this staggering scale.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">And the cliffs are nothing special — they are only visible because they were uplifted and exposed. This rock is called chalk, a sedimentary rock. By now you have guessed it: \u003Cstrong>chalk gave the Cretaceous its name\u003C\u002Fstrong>. There was so much of it that it named an entire geological period.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Behind evolution lies countless rounds of reproduction, competition, elimination and death. Ruthless natural selection preserves the genetic variations that fit the environment better.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Standing in front of the cliffs, looking at the corpses of marine plankton smaller than a hair's width, piled 110 meters high — that is when you viscerally feel how much death happened here.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">And the Cretaceous was already a thriving age of life.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">\u003Cimg src=\"\u002Fattachment\u002F20261007\u002Ff3bb5db4670e419c8144e9b9aa6f0339.webp\" alt=\"img_01.webp\">\u003C\u002Fp>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>Older Still: Banded Iron Formations\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">You may ask: were there earlier biominerals? By the Cretaceous, Earth already hosted giants like Tyrannosaurus rex and Triceratops. The answer: yes — the \u003Cstrong>Banded Iron Formations\u003C\u002Fstrong> (BIF).\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">They are spectacular.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">The early ocean held vast amounts of dissolved Fe²⁺ (ferrous iron). As certain microbes — especially photosynthetic, oxygen-producing ones — grew in importance, oxidation converted Fe²⁺ into insoluble iron minerals, which settled to the seafloor. This was the \u003Cstrong>Great Oxidation Event\u003C\u002Fstrong>, about 2.5 billion years ago.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Over hundreds of millions of years, the deposits built up:\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">black\u002Fred iron layers + gray-white chert layers\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Alternating, layer after layer, until they formed enormous iron formations.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Many of the world's giant iron ore deposits are, in essence, geological relics of microbes changing the global chemistry of the planet 2.5 billion years ago. Not all iron ore is BIF — the share is about 60%. But that means the majority of global iron resources are BIF-hosted.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">\u003Cimg src=\"\u002Fattachment\u002F20261007\u002F1612951056cf4b1a8617722d4b2c31ee.webp\" alt=\"img_02.webp\">\u003C\u002Fp>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>Evolution Is a Funnel\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">Put plainly, evolution is a giant funnel: every step forward is paid for with vast amounts of death and extinction. The scale is simply beyond ordinary comprehension — which is why evolution feels abrupt.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">When an ordinary person stands before the cliffs and sees that a small wave from the Cretaceous ocean solidified into 110 meters of rock, they can finally feel real awe and understanding of evolution.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">And consider this: the car that carries you to the cliffs is made of steel that is a gift from microbes 2.5 billion years ago. The fuel is the remains of algae and plankton from hundreds of millions of years ago.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">So we drive steel bequeathed by ancient life, burn the sedimentary remains of ancient life, and arrive at cliffs built from the corpses of countless organisms — while the \"I\" that can gaze at all of it and understand it is itself a short-lived fruit of four billion years of evolution.\u003C\u002Fp>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>The Tree of Life, With the Mass Extinctions Shown\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">Let me end by sharing an evolutionary chart I have treasured for a long time. It is stunning.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">The chart compresses about 4 billion years of life's history into a radial structure: life begins from a narrow shared origin at the bottom, branching and expanding until it forms an almost explosive complexity. But arcs labeled \u003Cstrong>Mass Extinction\u003C\u002Fstrong> carve enormous gaps into the branches — and they are chilling.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">The tree of life looks like a magnificent blooming. Yet the material of the bloom is countless failures, eliminations and disappearances.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">It even made me think of Neon Genesis Evangelion. In this chart, humans are just one small branch. Every organism is a temporary side branch. Mass extinction carries no good, no evil, no purpose, no pity. Life does not move toward humans; it simply keeps testing, in contingency.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Life is extraordinarily tenacious, while individual lives are extraordinarily fragile. The whole continues; individuals and species can be cast aside easily. Birth and destruction are not opposites — they are two faces of the same process.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">\u003Cimg src=\"\u002Fattachment\u002F20261007\u002F980e3f4ed1964f61a83c930620625591.webp\" alt=\"img_03.webp\">\u003C\u002Fp>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>A Short-Lived Fruit, Briefly Looking Back\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">May everyone who reads this treasure the self-awareness that took Earth 4 billion years of evolution to produce. We are not only survivors of a long history of life — we are also the eyes that life briefly opened when it first looked back at itself.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">This is what I thought of today by the sea in Sanya, listening to the waves that have sounded, unchanged, from 4 billion years ago until today.\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 18px;\">Curious what the organisms that built these cliffs look like under a microscope? \u003Cstrong>WWAI\u003C\u002Fstrong> is an AI-powered biology encyclopedia with an online microscope, including a \u003Cstrong>cyanobacteria specimen where cells without a formed nucleus and the photosynthetic pigments that once oxidized the ancient ocean are clearly visible\u003C\u002Fstrong>. Search \"WWAI\" in your app store and download it today.\u003C\u002Fp>\n\u003Cdiv class=\"dp-template-card\" style=\"border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1);margin:10px 0;max-width:100%;overflow:hidden;width:100%;\">\n \u003Ca style=\"display:block;text-decoration:none;\" href=\"https:\u002F\u002Fyun-hub.chat\u002Flink\u002F?app=wwai&clickid=stellarx&dplink=specimenid%3D1053\" target=\"_blank\">\u003Cimg class=\"image_resized\" style=\"display:block;height:auto;max-width:100%;width:100%;\" src=\"\u002Fattachment\u002F20260824\u002F5ba5dd3c38404fe785f43c44423830de.png\" alt=\"5ba5dd3c38404fe785f43c44423830de\">\n  \u003Cbutton style=\"align-items:center;background-color:#1f983e;border-radius:0 0 25px 25px;border-style:none;color:#ffffff;cursor:pointer;display:flex;font-family:Times New Roman;font-size:19px;height:40px;justify-content:center;padding:0;width:100%;\">EXPLORE NOW\u003C\u002Fbutton>\u003C\u002Fa>\n\u003C\u002Fdiv>\n\u003Ch2 style=\"color:#111;font-size:21px;line-height:1.4;margin:28px 0 12px;\">\u003Cstrong>References\u003C\u002Fstrong>\u003C\u002Fh2>\n\u003Cp style=\"margin:0 0 18px;\">All illustrations are AI-generated.\u003C\u002Fp>\n\u003Cp style=\"color:#111;margin:28px 0 8px;\">\u003Cstrong>Related reading\u003C\u002Fstrong>\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 20px;\">\u003Ca style=\"color:#111;text-decoration:none;\" href=\"https:\u002F\u002Fstellarx.tech\u002Farticle\u002Fmale-lactation-evolution-qsdc\">\u003Cimg class=\"image_resized\" style=\"border-radius:8px;display:block;height:auto;margin-bottom:6px;max-width:520px;width:100%;\" src=\"https:\u002F\u002Fcdn.banyunjuhe.com\u002Fattachment\u002F20261001\u002Fd5100f3325084648a297395442dcb54c.webp\" alt=\"Male Lactation Is Real: Why Females Nurse\">\u003C\u002Fa>\u003Cbr>\u003Ca style=\"color:#0b6cb0;text-decoration:none;\" href=\"https:\u002F\u002Fstellarx.tech\u002Farticle\u002Fmale-lactation-evolution-qsdc\">\u003Cstrong>Male Lactation Is Real: Why Females Nurse\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 20px;\">\u003Ca style=\"color:#111;text-decoration:none;\" href=\"https:\u002F\u002Fstellarx.tech\u002Farticle\u002Ff4b1c3-ai-animation-evolution-debate\">\u003Cimg class=\"image_resized\" style=\"border-radius:8px;display:block;height:auto;margin-bottom:6px;max-width:520px;width:100%;\" src=\"https:\u002F\u002Fcdn.banyunjuhe.com\u002Fattachment\u002F20260830\u002F8689d819a3d24107b610eb4e3cf0588d.png\" alt=\"Nature’s Living Flamethrower: When AI Animation Ignites Evol…\">\u003C\u002Fa>\u003Cbr>\u003Ca style=\"color:#0b6cb0;text-decoration:none;\" href=\"https:\u002F\u002Fstellarx.tech\u002Farticle\u002Ff4b1c3-ai-animation-evolution-debate\">\u003Cstrong>Nature’s Living Flamethrower: When AI Animation Ignites Evol…\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\n\u003Cp style=\"margin:0 0 20px;\">\u003Ca style=\"color:#111;text-decoration:none;\" 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mass extinction","2026-10-07 19:38:11","Science Guide Wwai",77,0,true,{"id":20,"slug":21,"title":22,"lang":23},12765,"homochirality-life-mirror-hmls","同手性是什麼？2026 諾貝爾化學獎得主解開生命之謎","zh",{"prev":25,"next":29},{"id":26,"slug":27,"title":28,"categoryId":16},12756,"sacculina-crab-parasite-qjwf","Sacculina: The Crab-Castrating Parasite Explained",{"id":30,"slug":31,"title":32,"categoryId":16},12754,"urinary-retention-catheter-removal-fqzp","Catheter Removal: Why Half Still Can't Pee",[34,39,44,49],{"id":35,"slug":36,"title":37,"thumbnail":38,"categoryId":16},12764,"homochirality-nobel-chemistry-hcmr","Homochirality Explained: Nobel Chemistry 2026 | stellarx","\u002Fattachment\u002F20261007\u002Fa7618c12a0c9425fa203d289db1adb65.webp",{"id":40,"slug":41,"title":42,"thumbnail":43,"categoryId":16},12763,"phone-in-bed-eye-strain-pbey","Is Using Your Phone in Bed Bad for Your 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