Technotranscendence wrote:
> I admit, I have some problems with it. What!?! The usual way the scenario
> is put, it's hard to believe anything above bugs and bacteria would survive.
> There has to be a reason why crocodiles, mammals, lizards, toads, and birds
> made it, but T. rex didn't. A big asteroid hit would seem to be more
> egalitarian in its affects, taking out all major groups -- not specifically
> targeting nonavian dinosaurs.
Some species are more robust and more capable of
adapting to changing environments than others. We
have plenty of examples of species living today that
are on the ragged edge, such as the taxifornia condor.
It survives today only because of extraordinary efforts
on the part of the environmentalists to keep them
soaring. Apparently this movement does not accept
extinctions as a natural part of evolution, and so attempt
to prevent all extinctions.
On the flip side, we have plenty of examples of super
robust, super-adaptable species, such as rats, mosquitos
and humans. spike
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