Of course it was “previously unknown”....................
It could be from the same rock art culture that left this kind of thing throughout the hemisphere over a long period of time.
What’s needed is, someone with some better cognition than this guy:
“It is almost impossible to get into the minds of people living so many [thousands of] years ago” Pérez-Gómez said, but “definitely these signs had a ritual meaning.” ... While it’s unknown exactly how old the rock art is, similar rock art in Brazil has been dated to around 4,000 years ago.
Brazil, up to 12.5K old:
https://freerepublic.com/focus/chat/4255666/posts