It was tens of thousands of years ago when drawings were made on cave walls. Did you know that "After examining dozens of Ice Age cave sites across Europe, pa

It was tens of thousands of years ago when drawings were made on cave walls. Did you know that "After examining dozens of Ice Age cave sites across Europe, paleoarchaeologist Genevieve von Petzinger discovered our ancestors repeatedly used 32 signs." [1] "That fits well with the discovery of a 70,000-year-old block of ochre etched with cross-hatching in Blombos cave in South Africa. And when von Petzinger looked through archaeology papers for mentions or illustrations of symbols in cave art outside Europe, she found that many of her 32 signs were used around the world (see “Consistent doodles”). There is even tantalising evidence that an earlier human, Homo erectus, deliberately etched a zigzag on a shell on Java some 500,000 years ago. “The ability of humans to produce a system of signs is clearly not something that starts 40,000 years ago. This capacity goes back at least 100,000 years,” says Francesco d’Errico from the University of Bordeaux, France." [2] [1] https://ideas.ted.com/what-the-mysterious-symbols-made-by-early-humans-can-teach-us-about-how-we-evolved/ https://ideas.ted.com/what-the-mysterious-symbols-made-by-ea... [2] https://www.newscientist.com/article/mg23230990-700-in-search-of-the-very-first-coded-symbols/ https://www.newscientist.com/article/mg23230990-700-in-searc...