The solution to an old riddle
leads to a new rubric for an old remedy:
Thousands of years before the Joker gassed comic book victims into a grinning death, Phoenician colonists on the island of Sardinia were forcing smiles on the faces of the dead. Now scientists say they know just how the ancient seafaring traders created the gruesome smiles some 2,800 years ago—not with a toxic gas like Batman's nemesis but with a plant-based potion. ... About a decade ago, a Sardinian shepherd committed suicide by eating a hemlock water-dropwort, leaving a corpse with a striking grin.
Water dropwort is the homeopathic remedy Oenanthe Crocata