Dolphins have names for one another.
18
Sloths take two weeks to digest their food.
243
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
Only 3% of bird species have penises.
0
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
The largest earthworm on record was found in South Africa and measured 22 feet.
151