Extras

Nature

Maned Lioness Displays Both Male and Female Traits

Clip: S31 Ep3 | 3m 10s

An African lioness that looks and acts male may be the secret to her pride's success.

Nature

Animal Odd Couples Preview

Preview: S31 Ep3 | 31s

It's time to challenge the notion that only humans form lasting friendships.

Nature

The Benefits of Friendship

Clip: S31 Ep3 | 1m 40s

The social behavior of nonhuman primates and the benefits of friendship.

Nature

Studying the Emotional Lives of Animals

Clip: S31 Ep3 | 3m 47s

Marc Bekoff, featured in Animal Odd Couples, on the scientific study of animal emotions.