The oldest observatory in the Americas has been discovered in Lima, Peru.
The site dates back 4,200 years—800 years before such artistic and scientific skill was previously known to have existed in the Americas.
The find was part of an ancient temple built by an unnamed civilization from Peru's "pre-ceramic" period, which predated the better-known Inca culture by thousands of years.
Temple structures, including a giant carving of what looks like a frowning face, align with the directions of sunrise and sunset at critical points in the agricultural calendar, including December 21, the start of the Southern Hemisphere's growing season, and June 21, the end of harvest.
Previously: Lazy Weekend Links (Egyptian tomb discovered)
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