So many juvenile great white sharks are biting—but not eating—sea otters that scientists say the phenomenon could slow the marine mammals’ recovery.

When hungry sea otters smack spiky urchins against rocks on their chests, the mammals may also be striking a blow against climate change.

From a group of playful otters vying over a fresh fish to weeping plum trees glistening in the rain, the final selection of a National Geographic challenge open to amateur photographers have ...

California’s sea otters were once on the brink of extinction. But even after half a century of protection from the Endangered Species Act, their population is still at risk.

From a group of playful otters vying over a fresh fish to weeping plum trees glistening in the rain, the winners of a National Geographic contest open to amateur photographers have captured the ...