Nature

The 500-Pound Dinosaur Heart

Clip: Season 34 Episode 11 | 1m 14s

Titanosaurs were the world's largest dinosaurs, weighing as much as 100 tons by some estimates. In order to push blood around such massive bodies, they needed an enormous heart. A yet-to-be named species, found in the deserts of Argentina, may have had a heart that weighed over 500 pounds and was six feet around.

Aired: 02/17/16

Rating: NR

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