Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A lion in the wild usually makes no more than twenty kills a year.
186
When cats are happy, they may squeeze their eyes shut.
10
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
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402