How were calendars developed?
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The calendar we use today is based on the Julian calendar, which was introduced by the Romans in 46bc. It had 365 days, and the Romans had not yet discovered the need for leap years. By 1582 the Julian calendar was ten days out, and Pope Gregory decreed that ten days would have to go missing from that year.
This caused rioting because people felt that ten days of their lives had been stolen.
Magnetic energy produced by vast storms on the Sun's surface strikes the upper atmosphere of the Earth, producing patterns in the sky near the poles called the Northern Lights or aurora borealis.
The same effect in the southern hemisphere is called the aurora austral is.
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Date Added: 13 December '11
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