Only 3% of bird species have penises.
0
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Cats recognise the voice of their owner, but never evolved to care.
22
The Basenji dog is the only dog that is not able to bark.
4
The reindeer is the only mammal that can see UV light.
17
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
A cow produces around 200,000 glasses of milk in her lifetime.
373
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132