Photo of helicopter dropping water

Blackouts Possible Again as Fire Danger Looms in California

Less than two weeks after blacking out much of Northern California, PG&E is warning that dangerous fire weather could prompt it to shut off power to about a half-million people. Pacific Gas & Electric began notifying customers Monday that it could b...
Photo of a male tungara frog in Panama

Croak to Croon: City Frogs Sing More Alluring Love Songs

WASHINGTON — City frogs and rainforest frogs don't sing the same tune, researchers have found. A study released Monday examined why Panama's tiny tungara frogs adapt their mating calls in urban areas — an unexpected example of how animals change communicati...