Cows can sleep standing up, but they can only dream lying down.
745
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5