Iron weighs more after it rusts.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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According to studies, men change their minds two to three times more often than women.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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A cesium atom in an atomic clock beats over nine billion times a second.
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4.5 pounds of sunlight strike the Earth each day.
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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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