Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Cats recognise the voice of their owner, but never evolved to care.
22
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
A 42-foot sperm whale has about 7 tons of oil in it.
209