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Graptolite evolution remained frozen after ice age for 2 million years

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Graptolite evolution remained frozen after ice age for 2 million years Empty Graptolite evolution remained frozen after ice age for 2 million years




After the ice age the end of the Ordovician, the graptolites that remained didn't evolve quite as quickly as paleontologists expected. Rather, the evolutionary explosion was delayed by about 2 million years. Why?

UChicagoNews - Explosive evolution need not follow mass extinctions (press release with photos of fossils, David Bapst)
schnautzr
schnautzr
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