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How the Chalicothere Split In Two

Season 1 Episode 39 | 7m 03s

Two extinct relatives of horses and rhinos are closely related to each other but have strikingly different body plans. How did two of the same kind of animal, living in the same place, end up looking so different?

Aired: 04/23/18
Extras
Get ready for the all-new season, coming January 17, 2027 at 9/8c.
The cast play a game of "What's in the vet bag?" with sentimental props from the series.
Celebrate the legacy of Gene Wilder, the actor behind Willy Wonka and Young Frankenstein.
Stephanie J. Block and Sebastian Arcelus join The Tabernacle Choir for an epic holiday celebration.
Explore the site of the Battle of Camden and its importance to the American Revolution.
Formerly enslaved Americans formed Britain's Colonial Marines unit and marched on Washington, D.C.
A metal detector survey reveals long-lost soldiers at Camden Battlefield.
A musket ball reveals the deadly reality of Revolutionary War combat.
DNA may help identify a soldier killed at the Battle of Camden.
The chimpanzees in Fongoli have adapted humanlike behaviors to survive their environment.
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