When cats are happy, they may squeeze their eyes shut.
10
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
The largest earthworm on record was found in South Africa and measured 22 feet.
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