[a fool in paradise]

killed by global warming no doubt

[SunkenCiv]

There's no good date estimate on this yet, but my uneducated guess is, these are in excess of 500K, and definitely very much in excess of the black mat impact event at the end of the megafauna era. But, that won't stop me from posting this again:

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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization by Richard Firestone, Allen West, and Simon Warwick-Smith

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