A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
The reindeer is the only mammal that can see UV light.
17
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7