When cats are happy, they may squeeze their eyes shut.
10
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
A scorpion can hold its breath for up to 6 days.
19
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Penguins have a gland above their eye that turns saltwater into freshwater.
12
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492