Scientists have long believed that an asteroid impact in what is now Mexico wiped out 80 percent of all species on Earth–including the dinosaurs–about 65 million years ago.
But exactly what happened when that cataclysmic collision occurred, and why did it lead to the mass extinction? Those questions have been part of a complicated puzzle for scientists to piece together.
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The research was published online Jan. 22 in the Journal of the Geological Society.
