Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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Cats sleep for 70% of their lives.
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Early American humans hunted car-size armadillos and used their shells for houses.
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Only 3% of bird species have penises.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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