'Meteorite' pulled from Russian lake
16 October 2013 Last updated at 13:33 BST
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.