Mosquitoes don't just bite you, they also pee on you.
11
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Dogs have been man's pet for over 14,000 years.
224
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492