Playtime with their siblings is essential for all young cats. It's how they hone their strength and hunting skills.

The boxer crab has an extraordinary method for self-defense: it wards off predators using toxic sea anemones clenched in its tiny claws.

When born, baby caterpillars are smaller than a grain of rice.

Butterflies have a remarkable method for mating. See how these incredible insects reproduce.

Sudan is the last male Northern White rhino in existence, and at the age of 43, he's an old man by rhino standards.

Devil rays are fish with wing-like fins that stretch over nine-feet wide. Every summer, a large population gathers near the Azores, an island chain to the west of Portugal.

Cheetahs are experts at chasing down prey over the open savannah, but brush-covered scrubland presents an entirely different challenge.

The NATURE miniseries "Animals with Cameras" features camera-wearing meerkats who live in the Kalahari Desert of Southern Africa.

Newborn meerkats are typically hidden from view, only emerging from their burrow when two to three weeks old. In a filmmaking first, a camera-wearing meerkat goes underground to reveal her colony's newest pups.

Kimbang is a four-year-old female chimp who had a difficult start in life.