Mass extinction, Pt 3 of 3: Fashion, Chaos and Healthy Skepticism

We have seen that an impact was probably associated with the “dino-killing” K/T extinction, but not definitely with any of the other Big Five – the Ordovician, Devonian, Permian and Triassic.

Now here’s a list from 2011, by a group of researchers led by Anthony Barnosky, showing possible causes for those mass extinctions. These are only some of the many scientific ideas out there about causes.


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