Why do we use the a.m.-p.m. system for telling time? The 24-hour day (i.e. 1300 for 1 p.m.) that the military uses seems so much simpler. Do you really think so? I always have to stop and think for a ...
A sundial discovered outside a tomb in Egypt's Valley of the Kings may be one of the world's oldest ancient Egyptian sundials, scientists say. Dating to the 19th dynasty, or the 13th century B.C., the ...
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