The Mark Test

The researchers place a white "X" on one side of Happy's head. When Happy sees the "X" in the mirror, she repeatedly touches the mark with her trunk (00:44)

Wildlife

Preview thumbnail for 10 Fascinating Facts About Owls

10 Fascinating Facts About Owls (03:03)

Preview thumbnail for Ten Fun Facts About Jellyfish

Ten Fun Facts About Jellyfish (02:45)

Preview thumbnail for Ten Fun Facts About Butterflies

Ten Fun Facts About Butterflies (02:27)

Preview thumbnail for A Wild Turkey Dust Bathing in New York

A Wild Turkey Dust Bathing in New York (01:00)

Preview thumbnail for The First Job Bees Have in Spring Is Grim

The First Job Bees Have in Spring Is Grim (02:06)

Preview thumbnail for Why ‘The Very Hungry Caterpillar’ Trope Isn’t an Exaggeration

Why ‘The Very Hungry Caterpillar’ Trope Isn’t an Exaggeration (01:16)

Preview thumbnail for This Prehistoric Fish Makes a Great White Look Like a Goldfish

This Prehistoric Fish Makes a Great White Look Like a Goldfish (03:02)

Preview thumbnail for How Svalbard's Glaciers Precipitate an Arctic Feeding Frenzy

How Svalbard's Glaciers Precipitate an Arctic Feeding Frenzy (02:21)

Preview thumbnail for This Ancient Fish Is Facing a Plummeting Population Crisis

This Ancient Fish Is Facing a Plummeting Population Crisis (01:21)

Preview thumbnail for A Chance Encounter With a Polar Bear and Her Two Cubs

A Chance Encounter With a Polar Bear and Her Two Cubs (02:16)

Preview thumbnail for Fascinating Footage of a Reef Squid Protecting His Mate

Fascinating Footage of a Reef Squid Protecting His Mate (01:55)