Cats recognise the voice of their owner, but never evolved to care.
22
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
The octopus does not have a blind spot.
273
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
Only 3% of bird species have penises.
0
The colossal squid has the largest eyes in the world.
4