Cats recognise the voice of their owner, but never evolved to care.
22
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
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
Sharks, like other fish, have their reproductive organs in their chests.
248
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
A scorpion can hold its breath for up to 6 days.
19
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27