A group of scientists discovered a giant slab with patterns that date back around 4,000 years ago during the Bronze Age. This giant piece of rock called the Saint-Bélec Slab measures 2 meters by 1.5 meters. It was first uncovered in 1900 by Paul du Chatellier in a prehistoric burial ground. After analyzing the marks, the scientists thought that the slab could be a map. The patterns in this 3d map represent the River Odet valley and its nearby rivers. The Geo-location showed that it is 80% correct. One of the study’s authors, Dr. Clément Nicolas of Bournemouth University, said that this might be the oldest discovered map in history. He added that this discovery is important because it highlights the early knowledge of ancient people.