Re: [Utah-astronomy] Where did you get your information?

Aha! And there is the astronomy tie-in. I knew if we waited it would appear. Many have theorized on periodic extra-terrestrial bombardment wiping most of the dominant biological slate clean, and giving "background" species a chance to evolve and proliferate. But isn't it "equalibrium"? Isn't "equiberium" some kind of diagnostic enemma using radioactive tracers? ;) --- Joe Bauman <bau@desnews.com> wrote:

While there is severe criticism of Gould's theory of "punctuated equiberium," this is a fantastic book to learn about life in the Cambrian.

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