You never know what you're going to find at the bottom of a lake.

But in the case of Lake Cherbakul in Central Russia, there's a good chance that if it's large and dark, it might be a meteorite.
As the BBC reports, several chunks of a meteorite have already been discovered in the lake, but none as big as the 570kg (1,256 lbs.) piece dredged up on Tuesday.
It's thought to be yet another piece from the space object that flamed through the skies in February (video embedded below), damaging a Russian factory and injuring, it's said, 1,000 people.
Vast meteorite pulled from Russian lake, breaks up | Technically Incorrect - CNET News