These seabirds are known for their wild look and sound—no wonder they're sometimes called the rock stars of the penguin world ...

The sun sets over a quiet backyard garden. A red fox sneaks into the yard, its nose in the air, sniffing loudly—it smells ...

When you see a snowy owl, it's clear how the bird probably got its name: they're snow-white. Males are generally whiter than females. As males grow older, they get whiter. The females never become ...

Although Nile crocodiles resemble armored tanks with huge, teeth-filled mouths, these reptiles are unusually attentive parents. When a large male Nile crocodile spots a female that catches his eye, he ...

These horses are able to detect smell and sound from great distances. They are smaller than most domestic horse species and ...

Sliding and wrestling, belly flopping, and somersaulting, river otters really know how to play! They take advantage of any ...

You probably know sea stars as starfish, the name sea stars are commonly known by. But sea stars aren’t really fish. Sea ...

Bison are the iconic image of the Great Plains and the Old West. They are massive, shaggy beasts and the heaviest land animals in North America. Despite their hefty size, bison are quick on their feet ...

Launching itself six feet above the ocean’s surface, a fish called a mobula ray does a flip before plunging back into the water with a splash. The fish is traveling with about a hundred other rays ...

One species, called woolly mammoths, roamed the cold tundra of Europe, Asia, and North America from about 300,000 years ago up until about 10,000 years ago. (But the last known group of woolly ...

The Gila monster is one of only a few poisonous lizards in the world. The Gila (pronounced HEE-luh) is the largest lizard ...