Sharks have been on the planet longer than trees.
14
Rattlesnake mating sessions have been known to last more than 22 hours.
232
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
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Cats and dogs can hear ultrasound.
350