Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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The reindeer is the only mammal that can see UV light.
17
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
In order to enhance the taste, Japanese macaque wash their food in salt water before they eat. They also make snowballs for fun!
7
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18