Instructional Video4:11
Why River Otters Have Bones… In Their Hearts Instructional Video
SciShow

Why River Otters Have Bones… In Their Hearts

12th - Higher Ed
Most mammals can develop bones in their hearts. For humans, it's usually a bad thing, but for river otters, it could be a useful adaptation.
Get Free Access See Review
Instructional Video4:14
Why River Otters Have Bones… In Their Hearts Instructional Video
SciShow

Why River Otters Have Bones… In Their Hearts

12th - Higher Ed
Most mammals can develop bones in their hearts. For humans, it's usually a bad thing, but for river otters, it could be a useful adaptation.
Get Free Access See Review