Aggressive horses, scared pigs, and hyperactive dogs are some of the "patients" treated by Ida Brajkovic at Croatia's first center for animal psychiatry.
Claude, an Asiatic black bear living in a Japanese zoo, has attracted attention for twirling sticks. The habit could be an act of boredom or play, experts say.
The largest freshwater fish ever caught, the Mekong giant catfish, could face extinction if a large dam is completed in Laos, experts say. Part six of an ongoing series on megafishes.
Proteins in the reptiles' blood have been shown to kill drug resistant bacteria and even to partially destroy the virus that causes AIDS, researchers announced.
Wild octopuses engage in "jealous murders," gender bending, and once-in-a-lifetime sex, unlike their seemingly shy, unromantic captive brethren, a new study says.