Cats recognise the voice of their owner, but never evolved to care.
22
Female kangaroos have three vaginas.
2
Denmark has twice as many pigs as there are people.
66
Gorillas can catch human colds and other illnesses.
205
A cow produces around 200,000 glasses of milk in her lifetime.
373
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217