When dragonflies mate, their tails form a love heart.
22
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
There's a rare breed of pig that looks like a sheep.
14
Cats recognise the voice of their owner, but never evolved to care.
22
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9