The reindeer is the only mammal that can see UV light.
17
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
When cats are happy, they may squeeze their eyes shut.
10
Sharks have been on the planet longer than trees.
14
The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
9
Bats sleep 18-20 hours per day.
5