Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Cats recognise the voice of their owner, but never evolved to care.
22
The cat brain weighs about 30g.
167
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2