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Eons: How the Walrus Got Its Tusks

7 minutes 42 seconds

Now Playing As: Captioned (English) (change)

The rise and fall of ancient walruses, and how modern ones got their tusks, is a story that spans almost 20 million years. While there are parts of the story that scientists are still trying to figure out, it looks like tusks didn’t have anything to do with how or what these animals ate. Part of the "Eons" series. Please note this title contains discussions on sexual reproduction and selection.

Media Details

Runtime: 7 minutes 42 seconds

Topic: Science
Subtopic: Earth Sciences, Marine Life, Prehistoric Life
Grade/Interest Level: 10 - 12
Standards:

Release Year: 2020
Producer/Distributor: PBS Digital Studios
Series: Eons
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An illustration depicts the dinosaur, Coelophysis, with new born Coelophysis in between its beak.

A painting depicts scientists comparing Piltdown Man's remains to other species. Charles Dawson and Sir Arthur Smith Woodward are seen standing together.

An illustration depicts a pair of dinosaurs fighting each other.

An illustration depicts a bat flying in sky.

An illustration depicts a pair of reptile like dinosaurs running in a desert. Image credit: Ceri Thomas.

An illustration depicts an extinct animal, the Giant Lemur.

An illustration depicts the earth of 50 million years ago, with a supercontinent Laurasia. Caption, Paleographic animation by C R Scotese.

An illustration depicts a theropod dinosaur, looking into a nest with eggs and newborn dinosaurs.

A skull from the fossils of Homo floresiensis, and a rough sketch of the limbs of the fossil remains are presented.

The sculpture, of a dragon sprawled, at the steps of Kinh Thien palace. Caption: Remains of Kinh Thien Palace.