When cats are happy, they may squeeze their eyes shut.
10
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
Lobsters have blue blood.
476
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Jumping fleas can accelerate 50 times faster than the space shuttle.
218