Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Female kangaroos have three vaginas.
2
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The reindeer is the only mammal that can see UV light.
17