The head of a jellyfish is called the "Bell."
6
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
The colossal squid has the largest eyes in the world.
4
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Cats and dogs can hear ultrasound.
350
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6