Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
When cats are happy, they may squeeze their eyes shut.
10
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
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
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
Sharks have been on the planet longer than trees.
14