U.S. Geologial Survey

Federal researchers are developing an early warning system for toxic algae blooms.

Mild Quake Shakes SE Ohio

Nov 20, 2013
Jason Reed / Getty Images

The U.S. Geological Survey says no injuries are reported after a mild earthquake struck in southeastern Ohio.

Nancy Stone / Chicago Tribune

Federal scientists say they've found evidence for the first time that Asian carp have reproduced successfully within the Great Lakes watershed.