Sharks have been on the planet longer than trees.
14
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
The reindeer is the only mammal that can see UV light.
17
A lion in the wild usually makes no more than twenty kills a year.
186
Mosquitoes don't just bite you, they also pee on you.
11
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10