The elixir of life is a mythical potion said to confer immortality. The ancient Chinese thought that precious substances like gold and mercury brought longevity, and these ingredients were often used in their elixirs. Ironically, some metals are highly toxic and thus poisoned the longevity seekers who ingested them. Buddhism gave the Chinese alternate routes to immortality, but the elixir of life received renewed attention in the 18th century with what claims about the Comte de St. Germain? Discuss