A polar bear's skin is black. Its fur is not white, but actually clear.
25
Emus and kangaroos cannot walk backwards.
26
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
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
Only female mosquitoes bite and drink blood.
28
A hummingbird weighs less than a penny.
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