Recently, researchers in northwestern France have been examining a Bronze Age rock with mysterious markings, hoping that the 4,000-year-old slab of stone may help lead them to the discovery of other ancient hidden secrets. At first
A piece of rock with mysterious markings that lay largely unstudied for 4,000 years is now being hailed as a "treasure map" for archaeologists, who are using it to hunt for ancient sites around north-western France.