As for the extinction of the dinosaurs the only solid fact is that no trace of dinosaur has been found after the Cretaceous. This calls for ideas of their sudden disappearance, and a great numbers of theories have been proposed, many of which with a preference for the dramatic.
It should be emphasise, however, that there is no reason to think that the dinosaurs disappeared suddenly. And there is neither any reason to think that they disappeared because they all died! All animals die, but extinction happens because lesser new are born than die.
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