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Eons: How the Walrus Got Its Tusks

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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:

A Wooly Rhino is grazing on the slope of a mountain.
Eons
Season 2 / Ep 23
13 minutes 14 seconds
Grade Level: 10 - 12
A group of four legged terrestrial creatures. Caption: Synapsids.
Eons
Season 2 / Ep 26
10 minutes 10 seconds
Grade Level: 10 - 12
A pair of Ichthyosaurs hunting prey in the sea.
Eons
Season 2 / Ep 27
9 minutes 38 seconds
Grade Level: 10 - 12
A giant deer roams a grassland.
Eons
Season 2 / Ep 31
6 minutes 53 seconds
Grade Level: 10 - 12
An illustration depicts the dinosaur, Coelophysis, with new born Coelophysis in between its beak.
Eons
Season 2 / Ep 32
10 minutes 37 seconds
Grade Level: 10 - 12
A painting depicts scientists comparing Piltdown Man's remains to other species. Charles Dawson and Sir Arthur Smith Woodward are seen standing together.
Eons
Season 2 / Ep 33
9 minutes 54 seconds
Grade Level: 10 - 12
An illustration depicts a pair of dinosaurs fighting each other.
Eons
Season 2 / Ep 34
8 minutes 35 seconds
Grade Level: 10 - 12
An illustration depicts a bat flying in sky.
Eons
Season 2 / Ep 35
11 minutes 9 seconds
Grade Level: 10 - 12
An illustration depicts a pair of reptile like dinosaurs running in a desert. Image credit: Ceri Thomas.
Eons
Season 2 / Ep 36
8 minutes 33 seconds
Grade Level: 10 - 12
An illustration depicts an extinct animal, the Giant Lemur.
Eons
Season 2 / Ep 37
10 minutes 9 seconds
Grade Level: 10 - 12