The fragment is so large that divers have been unable to lift it. Instead, it's been dragged along the bottom of the lake on a metal sheet. At 1,257 pounds--that's 570 kilos--It will be almost as big as the Holsinger meteorite, which landed in Arizona 50,000 years ago, and broke the scales when it was weighed earlier today. The rock will be tested to verify that it is from space and not from somewhere more mundane.