The Earth's atmosphere weighs about 5.5 quadrillion tons.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
One barrel of petroleum holds 42 gallons.
20
One 75-watt bulb gives more light than three 25-watt bulbs.
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Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Sound travels fifteen times faster through steel than through air.
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One cubic foot of gold weighs more than 1,200 pounds!
78