When dragonflies mate, their tails form a love heart.
22
A cow produces around 200,000 glasses of milk in her lifetime.
373
The reindeer is the only mammal that can see UV light.
17
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Sharks, like other fish, have their reproductive organs in their chests.
248
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9