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39 grains is about one-thirty-five-thousandth as heavy as a Kangaroo.
In other words, the weight of a Kangaroo is 33,000 times that amount.
(for red kangaroo, Macropus rufus) (adult, male)
An adult, male red kangaroo weighs up to 1,300,000 grains. Fantastic jumpers, red kangaroos can leap horizontally 9 m (30 ft) and vertically 3 m (9 ft) in a single bound.
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