By Antoine AGASSE LEUHAN, France, Oct 17, 2023 (AFP) – 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. The so-called Saint-Belec slab was claimed as Europe’s oldest map by researchers in 2021 and they have been working ever since to understand its etchings — both to help […]