The Mysterious "Accidental Mummies" of Medieval Siberia

Russian archaeologists are once again digging at Zeleniy Yar, a remote excavation site near the Arctic circle. This same site produced nearly a dozen extraordinary mummies a few years ago — including unintentionally preserved corpses wearing copper masks. The researchers are now hoping to learn more about this… » 4/14/14 9:40am 4/14/14 9:40am