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The Rise and Fall of the Bone-Crushing Dogs

Season 1 Episode 55

About the Episode

A huge and diverse subfamily of dogs, the bone-crushers patrolled North America for more than thirty million years, before they disappeared in the not-too-distant past. So what happened to the biggest dogs that ever lived?

Aired: 09/03/18 | Expires: | Runtime: 8m 29s
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