... If I see only this I would say they had time enough to evolve to a
really intelligent species. ..I am also looking after some people who
have some possibility to measure noble gas isotopic compositions. I
think some of this sort of measurement would be
enough to find the doubtless evidence about this question.I remember a cartoon from soon after the Alvarezs' theory was popularized showing a lecture hall full of dinosaurs. The speaker is saying, "Gentlemen, I present to you the Iridium bomb!"
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