From giant stick bugs to rarely seen sea creatures, these animal videos fascinated us—and led to new scientific discoveries.

Much of the three-part “Planet Weird,” which goes out of its way to find the nutty in nature, is simultaneously fascinating and disgusting—the much sought-after synthesis of wildlife programming: ...

Humans have shared life with animals for thousands of years, yet only a small number have ever become truly domesticated. While many wild creatures look calm or curious around people, most simply ...