Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Drivers kill more deer than hunters do.
660
Cats recognise the voice of their owner, but never evolved to care.
22
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
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9