The reindeer is the only mammal that can see UV light.
17
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
The colossal squid has the largest eyes in the world.
4