In a controversial new study, researchers point to ancient cave paintings as proof that people who lived nearly 40,000 years ago had advanced knowledge of astronomy. If true, this theory would dramatically change the timeline of humanity’s understanding of the natural world.

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In a controversial new study, researchers point to ancient cave paintings as proof that people who lived nearly 40,000 years ago had advanced knowledge of astronomy. If true, this theory would dramatically change the timeline of humanity’s understanding of the natural world.