U.S. Geological Survey
The latest news on U.S. Geological Survey
7.6-magnitude quake shakes Costa Rica, triggering tsunami warnings and power outages.
Japan tremor may be part of a second grouping of great quakes.
Funded by an earmark, scientists have discovered that the Montana bear population is doing better than expected.
As the ice melts, national rivalries heat up over oil and gas deposits and shipping routes.