Nabta Playa: The world’s first astronomical site was built in Africa and is older than Stonehenge
This 7,000-year-old stone circle tracked the summer solstice and the arrival of the annual monsoon season. It's also the oldest known astronomical site on Earth.

https://www.astronomy.com/observing/nabta-playa-the-worlds-first-astronomical-site-was-built-in-africa-and-is-older-than-stonehenge/

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