SCIENTIFIC AND TECHNOLOGY DEVELOPMENT

 Many ancient cultures were fascinated with the movement of the heavenly bodies because people thought that they exerted infl uence on earthly events. The ancients carefully observed astral rhythms and computed how the seasons fi t this schedule. Sumer, one of the earliest Mesopotamian cities, left behind the fi rst calendar (354 days) by 2700 b.c.e.China had developed a calendar system very similar to the modern one by 1400 b.c.e. In

 Central America the Maya developed an amazingly accurate calendar that could predict eclipses and 

planetary conjunctions that mirrored the modern way of calculating years, based on a commonly accepted event like the birth of Christ. Dionysius Exiguus (a Christian) invented the current datingsystem in the sixth century.

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