The world's oldest calendar has been discovered in a field in Scotland, a group of British archeologists believe. The twelve excavated pits in an Aberdeen field seem to mimic phases of the moon to track months over a year. "The evidence suggests that hunter-gatherer societies in Scotland had both the need and sophistication to track time across the years, to correct for seasonal drift of the lunar year and that this occurred nearly 5,000 years before the first formal calendars known in the Near East," [the project leader Vince] Gaffney told various media.