About 66 million years ago an asteroid roughly 10-15 km wide struck off Mexico's Yucatan, gouging a crater some 180 km across — and the extinction that followed wiped out the non-avian dinosaurs and around 75% of all species - Space Daily
- About 66 million years ago an asteroid roughly 10-15 km wide struck off Mexico's Yucatan, gouging a crater some 180 km across — and the extinction that followed wiped out the non-avian dinosaurs and around 75% of all species Space Daily
- Were dinosaurs doomed before the asteroid hit? Sciworthy
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