Sound travels about 4 times faster in water than in air.
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On average women say 7,000 words per day. Men manage just over 2000.
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Englishman Roger Bacon invented the magnifying glass in 1250.
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Nobody knows how big the universe is.
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You can make a clock work using a copper wire, a penny and a lemon or potato.
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In February 2001 it was announced that the human genome contains not 100,000 genes as originally expected, but only 30,000.
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Isaac Newton published his 'Principia' explaining the laws of gravity in 1687.
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Laser stands for 'Light Amplification by Stimulated Emission of Radiation'.
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There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy.
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The machine to win the first flying prize in 1901 was an airship.
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Benjamin Franklin began his research into electricity in 1746.
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The Hubble telescope is so powerful that it is like pointing a beam of light at a dime that is two miles away.
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According to an old English system of time units, a moment is one and a half minutes.
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One million, million, million, million, millionth of a second after the Big Bang the Universe was the size of a pea.
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Alfred Nobel invented dynamite in 1866.
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Water expands before it freezes.
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The only letter not appearing on the Periodic Table is the letter 'J'.
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The thermometer was invented in 1607 by Galileo.
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Scientists have discovered over 20 planets outside our solar system.
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A typical lightning bolt is 50,000 degrees F, which is hotter than the surface of the sun.
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The molecular structure of DNA was first determined by Watson and Crick in 1953.
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The first standardized system of measurement was created around 2700BC in Mesopotamia.
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The first laser was constructed in 1960 by Theodore H. Maiman of the United States using a rod of ruby.
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Gabriel Fahrenheit invented the mercury thermometer in 1714.
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DNA was first discovered in 1869 by Swiss Friedrich Mieschler.
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The modern safety match was invented in Sweden in 1855 by J.E. Lundstrom. It works because one of the chemicals needed to start the fire is in the striking surface.
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The speed of light is 186,000 miles per second.
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