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Re: Large last gasp of pterosaurs

> That's one possibility. Why did the ichthyosaurs disappear in the
> Cenomanian? Probably some kind of competition, but we're not sure.

Why "probably", when we have such a beautiful mass extinction at the
Cenomanian-Turonian boundary, with _the_ textbook Oceanic Anoxic Event and
exceptionally high temperatures? :-)

> Look at the long-running debate over the Pleistocene
> megafauna extinction in the Americas, although we've long known that
> people showed up shortly before they vanished. -- Jeff Hecht

At least the Clovis tips showed up at that time. The people seem to have
come earlier.