Roughly five billion. That is the number of Hiroshima-sized bombs it would take to match the energy...
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
Roughly five billion. That is the number of Hiroshima-sized bombs it would take to match the energy of a single morning 66 million years ago.
Author: Space Daily
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