Cows can sleep standing up, but they can only dream lying down.
745
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
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
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5