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Fleas seem to have an incredible jumping abilitly for two reasons. Firstly, it's because they're so small, which in turn means they are less effected by gravity. If you scaled one up to the size of a human, their jumping would be much less impressive. Seccondly, and probably more obvious, is that the flea has better legs for jumping than most creatures. Their hind leg contains 'resilin' (an elastic protien) which stores energy when it bends its legs, so when it jumps, the stored energy in the 'elastic' is released, and catapults the flea upwards.

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7y ago

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