“Darkness Shrouds the Planet” –Impact Winter Closes Case on End of Dinosaur Reign

"Darkness Shrouds the Planet" --Impact Winter Closes Case on End of Dinosaur Reign

 

The asteroid was so large that, even at the moment of impact, the top of it might have still towered more than a mile above the cruising altitude of a 747. “In its nearly instantaneous descent, it compressed the air below it so violently that it briefly became several times hotter than the surface of the sun,” is how mass-extinction authority, Peter Brannen describes the Chicxulub asteroid impact 66 million years ago which struck the Earth off the coast of Mexico at the end of the Cretaceous, creating an epic impact winter and a momentous, transitional day for the history of life on Earth.

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