One cubic foot of gold weighs more than 1,200 pounds!
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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A ball of glass will bounce higher than a ball made of rubber.
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Iron weighs more after it rusts.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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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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Nylon is made from coal and petroleum.
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