An Asteroid Didn’t Kill Off the Dinosaurs — a Comet Did
When comets pass close to the Sun, gravitational forces can rip them to pieces. One of those pieces probably hit Earth 66 million years ago, say astrophysicists.
When comets pass close to the Sun, gravitational forces can rip them to pieces. One of those pieces probably hit Earth 66 million years ago, say astrophysicists.