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Re: Vegavis gen. nov. - new anseriform in today's Nature
On Sun, 23 Jan 2005, David Marjanovic wrote:
> Oh please. That was just a magnitude 9 earthquake. The Chicxulub impact was
> equivalent to magnitude 11 to 13 -- that's 100 to 10,000 times as strong. I
> gather it means tsunamis with 100 to 10,000 times that energy.
I was commenting on the non-selective nature of a tsunami.
> > ...Most extinctions for which we have actual
> > _evidence_ point to species' interactions.
> Practically _all_ extinctions for which we have actual evidence have
> _humans_ involved. We haven't witnessed any _mass_ extinction so far.
If we're talking about island extinctions, humans are involved only
indirectly. The dirty work is done by introduced mammals (usually).
> > Curry and others have commented on the _lack_ of obvious
> > differences from one horizon to the next, i.e., K--->T
> Could you be more specific?
I couldn't find the paper...it's in the archives, I know. P. Currie is
one of the authors--title is something like "What Mass Extinction" or