Comet from edge of solar system killed the dinosaurs: study

Washington (AFP) – Sixty-six million years ago, a huge celestial object struck off the coast of what is now Mexico, triggering a catastrophic “impact winter” that eventually wiped out three-quarters of life on Earth, including the dinosaurs. A pair of astronomers at Harvard say they have now resolved long standing mysteries surrounding the nature and origin of the “Chicxulub impactor.”  Their analysis suggests it was a comet that originated in a region of icy debris on the edge of the solar system, that Jupiter was responsible for it crashing into our planet, and that we can expect similar imp…

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