Singing to females lights up reward centers in male zebra finches' brains, a new study shows. The effect possibly "addicts" the birds to courtship.

Some bald eagles are turning to seabirds as their main food, and in a roundabout way, the new diet is traceable to a 1990s otter collapse, researchers say.

The U.S. adventurer's plane "disintegrated" when it hit a California mountain, experts said. The presence of bears and other scavengers may help explain why so few remains have been found.

A bear wandered into a Subway sandwich shop in Canada, startling an employee, and sampling some food before letting itself out.

Chicken poop to power thousands of homes; urban bears live fast and die young; and more.

Periods of high solar activity create features that make the sun appear to have bigger "love handles," according to a new study of the star's true shape.

Truffle hunters in France believe global warming has led to an increase in parasitic attacks on wild truffles—spurring a boom in hothouse versions of the luxury fungus.

The entire planet comes into stunning focus using a new technique that removes atmospheric distortion.

People may have lived in Florida over 10,000 years ago—earlier than previously thought—according to evidence uncovered by National Geographic researchers.