This Roman 'gate to hell' killed its victims with a cloud of deadly carbon dioxide


Is it possible to walk through the gates of hell and live? The Romans thought so, and they staged elaborate sacrifices at what they believed were entrances to the underworld scattered across the ancient Mediterranean. The sacrifices—healthy bulls led down to the gates of hell—died quickly without human intervention, but the castrated priests who accompanied them returned unharmed. Now, a new study of one ancient site suggests that these “miracles” may have a simple geological explanation.

Rediscovered just 7 years ago, the gate to hell at the ancient city of Hierapolis, in modern-day Turkey, is a stone doorway leading to a small cave-like grotto. The gate was built into one wall of a rectangular, open-aired arena, topped by a temple and surrounded by raised stone seating for visitors.

http://www.sciencemag.org/news/2018/...carbon-dioxide