'Meteorite' pulled from Russian lake

Divers working at a Russian lake have recovered what may be a 570kg chunk of the space rock that exploded over Chelyabinsk earlier this year.

The object is thought to have plunged into Lake Chebarkul in central Russia leaving a 6m-wide hole in the ice.

If confirmed, it would be the largest fragment of the meteorite yet found.

Oleg Boldyrev reports.