HistoryFranceMystery of cave painting symbols solvedTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHistoryFrance01/23/2023January 23, 2023European hunter-gatherers painted cave walls for tens of thousands of years. Some of those pictures are marked with symbols. Their meaning was a mystery until a researcher recently figured out how they formed a lunar calendar.https://p.dw.com/p/4MZXDAdvertisement