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Cretaceous-Tertiary extinction event

What Would Happen If Comet Swift-Tuttle Hit the Earth?

Live Science - ‎Jul 21, 2016‎
If the comet were to strike the planet, the impact energy would be about 300 times that of the asteroid collision that was thought to have caused the Cretaceous-Tertiary extinction that killed the dinosaurs about 65 million years ago, according to ...

New dinosaurs found at Bay of Fundy fossil site

Cantech Letter - ‎Jul 20, 2016‎
Scientists are now in general agreement that the mass extinction -dubbed the Cretaceous-Tertiary (K-T) extinction event- was caused by an asteroid impact, likely that which created the Chicxulub crater in the Gulf of Mexico and said to have landed with ...