A new study reveals how dazzling sea slugs selectively stockpile poison to kill their enemies.
The Mystery Of The Killer Whale Baby Boom
In the Pacific Northwest, scientists are wondering why so many of one clan's calves are turning out to be boys.
New photo trap images from Panama give a tantalizing glimpse of these cat-sized dogs of Central and South America.
Experts weigh in on why chubby wild squirrels are being spotted and photographed in several countries.
In a place that welcomes hyenas after dark, an anthropologist ends up bonding with one of the fiercest predators on earth.
A new ruling from the US Fish and Wildlife Service adds lion protections under the Endangered Species Act.
Zolushka, the orphaned tiger cub who made headlines when she was rehabilitated and released, now makes history by giving birth in the wild.
Hundreds of white white-tailed deer may lose their accidental preserve at an old Army depot.
Larger than Yosemite and Yellowstone combined, the park strengthens an already massive green corridor.