The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Sharks, like other fish, have their reproductive organs in their chests.
248
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Cats sleep for 70% of their lives.
8
Elephants are terrified of Bees and actually have a special, distinct vocalization for “Run away the Bees are angry”
49
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