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An Underwater Revolution Millions of Years Ago Rewrote The Script of The Ocean 13 MARCH 2021 Look far enough back in time, and a pattern may emerge. After studying thousands of ancient fossils, paleontologist Jack Sepkoski identified just such a thing in 1981: an epic sequence of life and death, etched into the skeletons of the last 500 million years.   The late Sepkoski, a professor at the University of Chicago, discovered what became known as the three great evolutionary faunas of marine animals – a trio of successive explosions in biodiversity in the ocean over the course of the Phanerozoic Eon. These giant bloomings of marine life were bookended by catastrophes of world-changing scale: extinction-level events precipitating mass animal die-offs – simultaneously clearing the stage for new creatures to emerge and prosper in the spaces they left behind.

Alexis rojasJack sepkoskiMichal kowalewskiCommunications biologyUniversity of chicagoUniversity of floridaMesozoic marineMesozoic marine revolutionGreat dyingAmp quotஅலெக்சிஸ் ரோஜாஸ்தகவல்தொடர்புகள் உயிரியல்பல்கலைக்கழகம் ஆஃப் சிகாகோபல்கலைக்கழகம் ஆஃப் புளோரிடாநன்று இறக்கும்பரிணாம வளர்ச்சி