Technotranscendence <neptune@mars.superlink.net> Wrote:
>There has to be a reason why crocodiles, mammals, lizards, toads, and birds
>made it, but T. rex didn't.
It wasn't just the dinosaurs, no land species that weighed more than about 40 pounds
survived, perhaps because small animals are more numerous than big ones so there
was a better chance at least two would get lucky.
>A big asteroid hit would seem to be more egalitarian in its affects, taking out all
>major groups
It did.
>not specifically targeting nonavian dinosaurs.
It didn't.
>Archibald points out the myriads effects of sea level changes and how
> this correlates well with the fossil evidence -- much better than an impact
> or massive volcanism.
Then why did more than half of the marine species become extinct too? And why did
it happen in less than a hundred years, perhaps much less? And how did all those
Buckeyballs (C60) get made at that time if not by an impact? And what about the
excess of iridium, where did that come from is not from space?
John K Clark jonkc@att.net
This archive was generated by hypermail 2b30 : Mon May 28 2001 - 10:00:04 MDT