Penguins

Emperor penguins are the only penguin species that breeds on the frigid ice sheets of Antarctica in the dead of winter.

These penguin dads are basically walking hot-water bottles.

Why are thousands of female penguins washing up dead in South America?

Two male penguins are raising an egg together in Sydney's Sea Life Aquarium.

A solar eclipse is scheduled for Friday the 13th, but most skywatchers will be unlucky without doing a bit of traveling.

From the mantis shrimp to the dragonfly, here are 15 amazing animal eyes.

Did you know that the late drug lord Pablo Escobar flew kidnapped hippos to Colombia? Or that the African clawed frog Xenopus laevis was once used as a pregnancy test for humans?

An adorable pair of emperor penguins recently captured the cutest of all animal selfies when they encountered a camera left behind in their rookery.

Antarctica's Danger Islands hold an adorable secret.

"Animals with Cameras" presents wildlife habits that have never been seen by humans.

Adélie penguins in Antarctica nest in large colonies, and these groupings leave behind massive poop stains on the icy landscape — marks that are so large they can be tracked by satellites.

The March for Science was not only for people; penguins marched, too.

A volcano on Antarctica's Deception Island nearly wiped out one of the continent's largest and oldest penguin populations ... not once but three times throughout history.

There are 3.6 million more penguins in Antarctica than previously estimated.

Penguins that walked the Earth 61 million years ago might have been giants, growing to nearly 5 feet tall, according to the oldest fossils of these penguins unearthed to date.

Volcanic ash presents an uncertain future for penguin nesting grounds.