To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
84
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
After eating, a housefly regurgitates its food and then eats it again!
16
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
There are more insects in one square mile of rural land than there are human beings in the world.
55
An elephant's tooth can weigh as much as 12 pounds.
24
When it comes time to give birth, the female shark loses her appetite so she won't be tempted to eat her own pups.
280