Penguins have a gland above their eye that turns saltwater into freshwater.
12
A polar bear's skin is black. Its fur is not white, but actually clear.
25
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
In just about every species of mammal, the female lives longer than the male.
43
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Dragonflies can travel up to 60 mph.
25
The animal responsible for the most human deaths worldwide is the mosquito.
200
Cockroaches can live for 9 days after their head has been cut off.
140