Crows have been shown to be as smart as great apes. They are able to show imagination and anticipation of possible future events and are able to solve problems that require abstract reasoning.

A 19 foot long Australian alligator has a bite force of 3,700 pounds. That’s the highest bite force ever recorded.

The opossum is the only marsupial in North America.

The whiptail lizard is an all-female species. The males have gone completely extinct. Interestingly, they are not hermaphroditic. The females actually lay and hatch from unfertilized eggs. 

The pangolin is a mammal that looks like a reptile because of its scales. Its scales are made of keratin which is the same material as human fingernails.