The reindeer is the only mammal that can see UV light.
17
Cats recognise the voice of their owner, but never evolved to care.
22
There are approximately three chickens for every human on Earth.
13
Cats and dogs can hear ultrasound.
350
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The Basenji dog is the only dog that is not able to bark.
4