Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A giraffe's kick is so powerful that it can decapitate a lion.
216
Dogs have been man's pet for over 14,000 years.
224
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2