Asteroid fragments on a fast collision course

Asteroid fragments on a fast collision course

Over a million large asteroids, each several kilometres wide, are orbiting
the Sun in a belt between Mars and Jupiter. There are sometimes violent
collisions. Until now, it has been thought that the re-sulting asteroid
fragments would need several million years to reach the Earth. New
measurements from the Noble Gas Laboratory of ETH Zurich show however, that
the Earth could be reached much sooner. This knowl-edge is significant for
the prediction of future meteorite impacts on Earth.

http://www.starsandplanets.info/news...7&section=news

Interesting...