The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cats and dogs can hear ultrasound.
350
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Jellyfish as a species are actually older than dinosaurs and sharks.
383
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492