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Re: Supernova link to Rancholabrean fauna extinction?



On 7/22/2011 2:13 PM, bh480@scn.org wrote:
From: Ben Creisler
bh480@scn.org

The question of whether humans were agents in the extinction of the
macrofauna in the Americas may be one more of technology (Clovis weapons)
than physical presence.

This general debate would benefit greatly from a consensus definition of "extinction".

If climate change has stressed and reduced an animal population to 2 breeding individuals, and humans knock them off, is that a "human-caused extinction"?

There seems to be no agreement or discussion on this point...