TIL: Africa has a "stonehenge" older than Stonehenge. Built "to mark the summer solstice and the arrival of the monsoons" Nabta Playa "the oldest stone circle in the world" is among "Earths oldest astronomical" observatories. Over 7000 years old it was found mostly-buried in sand in the 1970s.
Upvoted: TIL: Africa has a "stonehenge" older than Stonehenge. Built "to mark the summer solstice and the arrival of the monsoons," Nabta Playa, "the oldest stone circle in the world" is among "Earth’s oldest astronomical" observatories. Over 7000 years old, it was found mostly-buried in sand in the 1970s. via /r/todayilearned https://ift.tt/2FIEP3X