Sea otters have the densest fur in the animal kingdom—1 million hairs per square inch as opposed to the 150,000 hairs on the entire human head. LEARN MORE:
Sea Otters Are Weird Gross and Beautiful
Share the knowledge!
Key Facts In This Video
Otter fur has up to 1 million hairs per-square-inch because they have no insulating fat. 00:57
Otters sleep floating on their backs. 02:16
Mother seals train baby seals how to swim when they're born, much like humans. 02:55
Haven't you always wondered?
A more curious you.
Join millions of lifelong learners