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 largest earthworm on record was found in South Africa and measured 22 feet.
151
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402