While it's much smaller than the largest supermassive black holes detected, it's still a whopper considering how early in the ...

Why it's incredible: Evidence suggests it could be the greatest known impact crater on Earth. The Wilkes Land crater is a hole in the bedrock beneath East Antarctica's ice sheet measuring 315 ...

Two river watchdog groups insist the Big Hole River needs a pollution fix and have called on the state’s environmental agency to make that happen. The Upper Missouri Waterkeeper and the Big Hole ...