A crater the size of the state of Ohio has been discovered in Antarctica, using NASA satellite photography. Scientists think it was made by an asteroid that impacted the area 250 million years ago, causing the greatest mass extinction on earth?even bigger than the one that killed the dinosaurs. Let's hope we're not next!
The crater is 300 miles wide and has been spotted by satellite, buried beneath a half-mile of ice. It?s twice as big as the impact that was left by the asteroid that killed the dinosaurs. In LiveScience.com, Robert Roy Britt quotes geologist Ralph von Frese as saying, "This?impact is much bigger than the impact that killed the dinosaurs, and probably would have caused catastrophic damage at the time."
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