the discovery of a buried impact crater (thought to be the result of a large comet striking the earth) that is 200 km (124. In several places around the world, at exactly 65 million years age, geologists have found large amounts of the metal iridium in clay bands. Benjamin Bonnefoy, a French researcher, presented "a study of Indian lava fields that suggested ancient volcanic activity was intense enough to have caused the climate changes believed to lie behind the extinction of the giant lizard" (Suzuki).
The general view is that perhaps dinosaur brains (grow) larger, but if they (exist) today, dinosaurs (not change) very much in general, and (look) much the same. This would have destroyed lots of the cretaceous plants, so herbivorous dinosaurs starved and the meat eating ones were left with nothing to eat either. Acid rain Dinosaur Extinction Theory - Catching a Cold Once upon a time there was a planet filled with millions of wild life, including the dinosaurs. The meteor crater is 180 km from rim to rim and scientists have worked out that the asteroid must have been 10 km across. This, again, would have caused a massive change in climate, which dinosaurs would have found hard to adapt. But there are very large amounts of iridium at the time the dinosaurs died out. The best evidence for the asteroid is found in the sedimentary rocks at the very end of the Craterous. Scientist dissertation alberto manguel have come up with some strange ideas but none of the theories really explains everything, so we will probably never be sure what happened. The effects of this kind of impact would have killed off many forms of life.
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