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On the main page there had been a comment that only the most adaptable animals survived the K-T extinction, like mammals. I don't believe this is concensus, and there is a lot of evidence against this. Dionsaurs were highly adaptable and diverse, as were ammonites and other groups that were devastated or destroyed, while crocodiles and other such forms managed to pull through. Indeed the placental mammals had not shown much diversity before the Cretaceous. If anything, then, I would say that the more conservative groups were the ones that faired better. If there is a kernel of truth in the statement, it will need considerable modification before it is true enough to replace. |
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