Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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For every gallon of sea water, you get more than a quarter pound of salt.
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One third of the electricity produced on earth is used to power electric light bulbs!
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One cubic foot of gold weighs more than 1,200 pounds!
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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One barrel of petroleum holds 42 gallons.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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