| 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. |