4,000-Year-Old Astronomical Observatory Discovered in Peru

Peru's cultural ministry announced the discovery of an ancient astronomical observatory at the coastal settlement of Áspero, part of the Caral civilization (3000–1800 BC), the oldest known in the Americas. The two-level stone structure, strategically located near pyramidal buildings, offers panoramic views of the seacoast and Supe Valley. Archaeologists led by Ruth Shady identified four construction periods, initially a public ceremonial building later remodeled with an oval platform and a central huanca (vertical stone) for ritual observation of celestial phenomena. Director David Palomino noted the observatory's link between astronomy and maritime activities—tracking sun, moon, and stars to predict tides and marine resource availability. Archaeologist Aldemar Crispín emphasized time measurement's role in organizing daily life and economic exchange between coastal fishers and valley farmers. A multidisciplinary team is now using radiocarbon dating to establish a precise timeline. This discovery underscores the Caral's sophisticated environmental management and cosmic understanding thousands of years before other global societies.