This story was originally published on The Conversation. It appears here under a Creative Commons license. The Cathedral of St. John the Baptist in Turin, Italy, houses a fascinating artifact: a massive cloth shroud that bears the shadowy image of a man who appears to have been crucified. Millions of Christians around the world believe that this shroud—commonly called the Shroud of Turin—is the cloth that was used to bury Jesus after his crucifixion and that the image on the shroud was produced miraculously when he was resurrected. The evidence,…