A million dollars weighs about a metric ton. Hence the expression "a ton of money."
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The cat brain weighs about 30g.
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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 hummingbird weighs less than a penny.
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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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One human hair can support 3 ounces.
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Dieters who sleep more take off more fat that those who sleep less.
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Fidgeting can burn about 350 calories a day.
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