Artist's conception of asteroid impact leading to mass extinction (space.com; msnbc).
The great impact of an asteroid that might have wiped out the dinosaurs apparently didn't get all of them. New fossil evidence suggests some dinosaurs survived for up to half a million years after the impact in remote parts of New Mexico and Colorado.
The whole idea that a space rock destroyed the dinosaurs has become controversial in recent years. Many scientists now suspect other factors were involved, from increased volcanic activity to climate change. Either way, some 70 percent of life on Earth perished, and an asteroid impact almost surely played a role. More>>
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