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Thousands of Gulf Grunion fish act on a seemingly suicidal desire to breed out of water.

To keep warm, emperor penguins converge on the same central point and begin to huddle.

The seasonal migration of billions of sardines is a stunning example of a swarm's defensive collective thinking.

These overgrown rodents are extraordinary engineers. Learn more about these unique, industrial creatures.

The beaver, more than any other animal, is responsible for creating fertile landscapes across North America. When beavers and their families work together to build their dams of stone, logs and mud, they are doing more than just protecting themselves from predators.

Beavers are devoted to their work as dam builders and they are born equipped and ready for the job.

Hairdresser Sherri Tippie, the top live trapper of the species in North America, rescues unwanted beavers in the Denver suburbs and then places them with farmers and beaver enthusiasts who eagerly provide new homes for them.

After two years in the field in Japan documenting the lives of a snow monkey troop, producer and cinematographer Joe Pontecorvo compiled over 700 hours of footage. In this segment, learn about the post-production process, from video and sound editing, to color correction, to music ...

Japanese Macaques that inhabit Jigokudani or "Hell Valley" must stick to together and adapt to harsh weather to survive and thrive. When they’re not soaking in hot springs during chilly months, snow monkeys can often be found foraging to sustain a rather diverse, omnivorous diet ...