Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cows can sleep standing up, but they can only dream lying down.
745
Parrot parents "name" their children with a signature call.
112
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8