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    3. what example of technology invention thas has not changend very much over the years?
    what example of technology invention thas has not changend very much over the years?

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    0  Views: 1776 Answers: 2 Posted: 13 years ago
    Tags: science
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      Gregorian Calendar:The Gregorian calendar is a blessing in human’s life. Invented in 1582, the system adopted a leap year cycle different than the one employed by the Julian calendar. The new calendar was considered an improvement on the earlier Julian model. In the Gregorian calendar, four years make up a cycle, with an extra or “leap” day added to the fourth year to keep the dates and months synchronized with the solar cycle.

      12 years ago. Rating: 0
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        Bicycles

        11 years ago. Rating: 0
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