Crabs and other crustaceans can actually feel pain and retain memories of painful experiences.
A goldfish has a memory span of three seconds.
Hippo milk is pink.
A cat has 32 muscles in each ear.
A shark is the only fish that can blink with both eyes.
A snail can sleep for three years.
Cats actually can't see what's under their own nose.
Ducks have the ability to put half their brain to sleep, and keep the other half awake.
There are more stars in the sky than grains of sand on the earth.
The Virginia opossum is the only marsupial (pouched mammal) indigenous to North America.
