Some ribbon worms will eat themselves if they can't find any food.
-33
A duck's quack doesn't echo, and no one knows why.
173
On average, it takes 660 days from conception for an elephant to give birth.
19
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Giant Panda Bears give birth to a 4 ounce Baby Panda!
23
Polar Bears can eat more than 50 lbs. of meat in one setting.
25
There are more insects in one square mile of rural land than there are human beings in the world.
55