The Basenji dog is the only dog that is not able to bark.
4
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
It is impossible to hum if your nose is plugged.
366
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515