Cats recognise the voice of their owner, but never evolved to care.
22
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
The cat brain weighs about 30g.
167
Elephants are terrified of Bees and actually have a special, distinct vocalization for “Run away the Bees are angry”
49
Sharks, like other fish, have their reproductive organs in their chests.
248
The male seahorse carries babies and 'gives birth' to them instead of the female.
7