Archeologists have discovered a lunar calendar in Aberdeenshire, Scotland, that is nearly ten thousand years old. Their findings show that the calendar makers (1) thought about time and (2) figured out a means to follow it at a period in history that was still in the Stone Age. The discovery is considered both surprising and important because it now places a calendar nearly five thousand years before what was previously considered as the first formal calendar, created in Mesopotamia 5,000 years ago. But here, a discovery has been made of a calendar construct appearing to track the phases of the moon nearly 10,000 years ago.
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