The new study has apparently provided physical evidence for the acute drop in the global temperatures that followed the impact of the Yucatan Peninsula off Mexico.

Researchers suggest that the 'Chicxulub' impact would have caused the global sea surface temperatures to come down by a conservative estimate of seven degrees Celsius.

While the 'nuclear winter' would not have lasted over a few decades, it had enough force to wipe away all the dinosaurs, reptiles and other life forms from the surface of the Earth since these creatures evolved to live in a warm and vegetative world.

According to sources, the evidence comes from the Brazos River region of Texas, where sedimentary rocks the same age as the asteroid impact contain layers of broken shells.

They are thought to have been left there by a tsunami triggered when the massive space rock plunged into the ocean.


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