One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
The reindeer is the only mammal that can see UV light.
17
Squirrels forget where they hide about half of their nuts.
698
Sharks, like other fish, have their reproductive organs in their chests.
248
The head of a jellyfish is called the "Bell."
6
Mosquitoes don't just bite you, they also pee on you.
11
