A linguistic anthropologist says the hand positions carved on a 1,300-year-old Maya stone altar encode calendar dates through ...

The Antikythera mechanism — an ancient shoebox-sized device that was used to track the motions of the sun, moon and planets — followed the Greek lunar calendar, not the solar one used by the Egyptians ...

I. The calendar: The day -- The Moon and the month -- The lunisolaryear -- Greek calendars -- The Athenian calendar -- The Macedonian calendar in Egypt -- The Egyptian year -- The Roman calendar -- ...