French caves are known for their prehistoric rock art. But also marked on the walls around the paintings are 26 symbols that have appeared again and again at French sites across 25,000 years of prehistory. Early signs suggest that many of these symbols crop up in other parts of the world too, leading some to wonder if symbolic communication arose with early humans.
Stone Age jottings

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“Maps are like campfires – everyone gathers around them, because they allow people to understand complex issues at a glance, and find agreement about how to help the land.”