The Rise and Fall of the Bone-Crushing Dogs

Season 1 Episode 55 | 8m 29s Video has closed captioning.

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: 09/04/18

Rating: NR


Problems Playing Video? | Closed Captioning