A polar bear's skin is black. Its fur is not white, but actually clear.
25
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The sloth (a mammal) moves so slowly that green algae can grow undisturbed on its fur!
104
In just about every species of mammal, the female lives longer than the male.
43
Freddie Mercury held parties with midgets carrying around trays of cocaine.
8
Over 10,000 birds a year die from smashing into windows.
47
Goldfish lose their color if they are kept in dim light or are placed in a body of running water, such as a stream.
12
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11