A hummingbird weighs less than a penny.
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The elephant brain weighs about 6,000g.
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Most elephants weigh less than a blue whale's tongue.
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There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
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Fidgeting can burn about 350 calories a day.
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A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
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A million dollars weighs about a metric ton. Hence the expression "a ton of money."
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