The Basenji dog is the only dog that is not able to bark.
4
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
The octopus does not have a blind spot.
273
The reindeer is the only mammal that can see UV light.
17
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
Alligators can live up to 100 years.
337