Torrential rains kill 14 in Brazil

Torrential downpours triggered flash floods and landslides across Brazil's Rio de Janeiro state, killing at least 14 people including eight children, and leaving five missing, authorities said Saturday.

Light pollution increasing year-round for some migrating birds

Nighttime light pollution levels are increasing the most in the southeastern United States, Mexico, and Central America—findings based on year-round data collected over the last two decades in the Western Hemisphere. This ...

Camouflage or communication: How birds use odor

What senses do birds use? Obviously, they use hearing and sight—after all, they sing and often have colorful plumage. But what about the sense of smell? For a long time, it was thought that olfaction played no role in birds. ...

The secret to longevity? Ask a yellow-bellied marmot

That's what a team of UCLA biologists and colleagues studying yellow-bellied marmots discovered. These large ground squirrels are able to virtually halt the aging process during the seven to eight months they spend hibernating ...

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