A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Dogs sometimes fake being sick to get attention.
26
Drivers kill more deer than hunters do.
660
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Lobsters have blue blood.
476
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20