This document discusses some of the most terrifying archaeological discoveries, including screaming mummies in Egypt whose mouths were found clenched open, a mass grave in Norway containing over 50 headless Vikings, a tomb in Mexico containing sunken skulls arranged in a circle at the bottom of a cenote, and bog bodies from northern Europe that were preserved in peat bogs with skin and organs still intact. It also mentions a mass grave of babies found in a sewer in Greece and evidence that ancient civilizations may have engaged in early forms of chemical warfare.