Catching a tiger by the tail may be ill-advised, but catching one on film is a prized achievement. See wildlife photographers set a camera ambush in the hopes of getting the elusive cats on film.
Scientists say they have isolated stem cells in adult mouse testicles that have properties similar to embryonic stem cells, offering possible clues to new sources of stem cells in humans.
They know what they like, and they're not afraid to ask for it. Chimps can show their grooming partners just where they want to be scratched, scientists report.
Despite a media frenzy over the animal's appearance, wildlife experts say they were not surprised to find a coyote in the heart of the U.S.'s largest city.
Watch footage from National Geographic's first land-based Crittercam, and get an unprecedented lion's-eye view of the wild, from quiet time with cubs to a deadly nighttime hunt.
Fight or flight? Meerkats can decide based on sound signals. Watch these African mongooses respond in complex ways to recordings of eagles, snakes, and pups.
With health experts warning that bird flu could hit the United States this fall, zoos officials are making plans to protect their valuable bird collections from the deadly disease.
Officials in dog-friendly San Francisco hope to harness the power of methane in dog waste so it can be used for heating homes and generating electricity.
There's an unidentified creature roaming the grassy fields near a North Carolina company—is it an exotic species, a mythical vampire dog, or simply a fox with a rare genetic abnormality?
It's now illegal in Florida, but feeding sharks for tourists continues elsewhere. Watch a close encounter and decide whether it ought to be outlawed everywhere.
