A million dollars weighs about a metric ton. Hence the expression "a ton of money."
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The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
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A hummingbird weighs less than a penny.
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The elephant brain weighs about 6,000g.
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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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The average person's skin weighs twice as much as their brain.
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Sex burns about 360 calories per hour.
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You burn 26 calories in a one minute kiss.
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