Denmark has twice as many pigs as there are people.
66
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4