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
Only 3% of bird species have penises.
0
Alligators can live up to 100 years.
337
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20