The elephant brain weighs about 6,000g.
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Sharks, like other fish, have their reproductive organs in their chests.
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Cows can sleep standing up, but they can only dream lying down.
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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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Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
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