Examining the medieval myth of the Philosopher's Stone, a Holy Grail-type relic which supposedly held the key to alchemy and immortality. Many noted alchemists and adventurers searched obsessively for the artefact hoping to learn its powerful secrets, a quest which allegedly drove some to madness and others to celestial encounters. It's one of the most coveted artefacts of the Bible: a gold-encrusted chest containing the Ten Commandments. Can modern scholarship explain the awful powers of the Ark of the Covenant and tell us how it vanished and where it is today.