A paleoanthropologist works at the rescue excavation site in the Zhoukoudian Caves, a UNESCO World Heritage site, in suburban Beijing on June 24. China Wednesday began a rescue excavation in the Zhoukoudian Caves, where the skulls of "Peking Man," or Homo erectus, were found in the 1920s and 1930s. The four-month project aims to protect the site against the threat of collapse (XINHUA) |