Cats recognise the voice of their owner, but never evolved to care.
22
When cats are happy, they may squeeze their eyes shut.
10
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Whales and dolphins can't taste anything other than salt.
11
Dolphins have names for one another.
18
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