Asteroid impact, not volcanic activity, killed the dinosaurs, study finds

This artist’s visualization shows an Ankylosaurus magniventris, a large armored dinosaur, witnessing an asteroid impact 66 million years ago. (Image credit: Fabio Manucci)

An asteroid impact, not volcanic activity, killed the dinosaurs, a new study finds. 

For decades, scientists have gone back and forth over exactly what caused a mass extinction event 66 million years ago, which destroyed about 75% of all life on Earth, including all of the large dinosaurs. Some have thought that volcanic activity could be to blame, but one new study shows that a giant asteroid impact was the prime culprit.

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