The asteroid responsible for our last mass extinction 66 million years ago — wiping out the dinosaurs — originated from the far reaches of our solar system, unlike most asteroids that have struck Earth, a new study reveals. The asteroid responsible for our last mass extinction 66 million years ago — wiping out the dinosaurs — originated from the far reaches of our solar system, unlike most asteroids that have struck Earth, a new study reveals. NBC News Science
Asteroid that killed the dinosaurs originated unusually far away from Earth, study shows
