Researchers in Egypt may have finally sold the mystery of one of archaeology’s creepiest finds. A discovery during a 1935 archaeological expedition at Deir el-Bahari near Luxor found a mummy of a woman with her mouth wide open in what looks like an anguished shriek. Scientists now have an explanation for the “Screaming Woman” mummy after using CT scans to perform a “virtual dissection.” It turns out she may have died in agony and experienced a rare form of muscular stiffening, called a cadaveric spasm, that occurs at the moment of death. The examination indicated that the woman was about 48 ye…