WARSAW, POLAND—A team led by archaeologist Marcin Krzepkowski has unearthed a large Late Bronze and Early Iron Age cemetery in northern Poland. At least 150 graves were discovered, and the cemetery contained more than 1,000 urns holding the cremated remains of the dead, who belonged to a farming people scholars call the Lusatian culture. The cemetery also held a number of bronze ornaments and a rectangular ceramic artifact known as a "moon idol," which Krzepkowski says are rare in this part of Poland. Among the graves were a number that held the remains of small children, who were buried with miniature ceramic vessels and clay rattles.