KAMENOVO, BULGARIA—Archaeologists from the Bulgarian Academy of Sciences, the Razgrad Regional Museum of History, and the Ruse Regional Museum of History unearthed a workshop used for making flint tools dating to around 4800 B.C. while looking for a necropolis at the Chalcolithic site near Kamenovo in northeast Bulgaria. Archaeology in Bulgaria reports that pieces of flint, in addition to unfinished and completed tools, were found, along with fragments of pottery, in a layer of black sediment on clay-coated ground. This huge workshop is thought to have produced high-status tools found in other archaeological sites in Bulgaria. To read about a spectacular discovery from a later period in Bulgaria, go to "Thracian Treasure Chest."