Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4