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Dale - Computer Science Illuminated 37

Dale - Computer Science Illuminated 37 - Stonehenge Is...

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Stonehenge, a Neolithic stone struc- ture that rises majestically out of the Salisbury Plain in England, has fasci- nated man for centuries. It is believed that Stonehenge was erected over several centuries beginning in about 2180 B.C.. Its purpose is still a mystery, although theories abound. At the summer solstice, the rising sun appears behind one of the main stones, giving the illusion that the sun is balancing on the stone. This has led to the early theory that Stone- henge was a temple. Another theory, first suggested in the middle of the 20 th century, is that Stonehenge could have been used as an astro- nomical calendar, marking lunar and solar alignments. And yet a third theory is that Stonehenge was used to predict eclipses. Regardless of why it was built, there is a mystical quality about the place that defies explanation. Stonehenge Is Still a Mystery operations: addition, subtraction, multiplication, and division. Unfortu- nately, the state of mechanical gears and levers at that time was such that the Leibniz machine was not very reliable.
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