Female kangaroos have three vaginas.
2
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
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
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Jumping fleas can accelerate 50 times faster than the space shuttle.
218