Some scientists proposed asteroid collisions as a mechanism.

The family is believed to have been created 5.8 0.2 million years ago, making it the most recent known asteroid collision.

It is almost certainly the scar of an ancient asteroid collision with the Earth.

Most of the dust was in or near the asteroid belt, created by asteroid collisions.

Spread out over the waiting time, the dangers of asteroid collision do not seem very worrisome.

Many scientists believe that an asteroid collision with Earth 65 million years ago led to the extinction of the dinosaurs.

Duncan Steel, world authority on space science and asteroid collisions.

The asteroid collision with Earth is a rare event in the galaxy.

A more dramatic view of Mudd's ship as it is destroyed by an asteroid collision.

(Some scientists believe it was also an asteroid collision that wiped out the dinosaurs themselves about 135 million years later.)