The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
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Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
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One barrel of petroleum holds 42 gallons.
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The average home creates more pollution than does the average car.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Airports that are at higher altitudes require a longer airstrip due to lower air density.
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