Sharks have been on the planet longer than trees.
14
When cats are happy, they may squeeze their eyes shut.
10
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12