found in 1886 and now located in the Egyptian Museum in Cairo... [c]alled both "Unknown Man E" and the "Screaming Mummy" because of his open jaw and agonized expression, the mummy has baffled researchers since it was first uncovered. Several archaeologists have proposed theories about the mummy's cause of death, saying he might have been buried alive or poisoned, or that he was a murdered Hittite prince during the reign of Tutankhamen. Archaeologists now agree, however, that mummies are commonly found with their jaws open as a result of their heads falling back after death... The theory about poison, on...