This undated handout photograph made available by the Franco-Iranian Paleoanthropology Program (FIPP) shows the limestone massif where the Qaleh Kurd cave is located (seen top L), in Qaleh valley. Thousands of carved stone tools, horse bones and a milk tooth: a cave in Iran's central plateau has yielded traces of human occupation dating back 452,000 to 165,000 years, the oldest ever found in this immense territory at the crossroads of the Levant and Asia. (Photo by Handout / Franco-Iranian Paleoanthropology Program / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / HANDOUT / FRANCO-IRANIAN PALEOANTHROPOLOGY PROGRAM " - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS (Photo by HANDOUT/Franco-Iranian Paleoanthropology Program/AFP via Getty Images)