Cats and dogs can hear ultrasound.
350
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 elephant brain weighs about 6,000g.
274
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212