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16 May 2008
Satellites that carry many of our phone calls and live television programs are stationed about 22,240 miles away.
The idea of using "emoticons" - symbols that indicate certain emotions - in e-mail was made by Kevin MacKenzie in 1979.
The Millenium Dome in London can be seen from space. The shell is 1km in circumference.
The official definition of a second is the time it takes for 9,192,631,770 oscillations of the Cesium atom at zero magnetic field.
There is no more than one-tenth of a calorie's worth of glue on every stamp.
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