Paleontologist
Peter Ward offers evidence in his April 2007 book,
Under a Green Sky, that all but one of the major extinction events in history have been brought on by climate change — the same global warming that occurs today. Reviewer Doug Brown goes further, stating
[2] "This Is How The World Ends". Scientists at the Universities of York and Leeds also warn that the
[3] fossil record supports evidence of impending mass extinction], according to a
ScienceDaily release, Oct. 24, 2007.
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Acid is like swimming... if you cant swim, why would you go to the deep end?
For example
mammaliformes ("almost mammals") and then
mammals existed throughout the reign of the
dinosaurs, but could not compete for the large terrestrial vertebrate niches which dinosaurs monopolized. The
end-Cretaceous mass extinction removed the non-avian dinosaurs and made it possible for mammals to expand into the large terrestrial vertebrate niches.