whyy.org/articles/alchemy-exhibit-philadelphia-science-history-institute From turning ordinary metal to gold to chemistry: New Philadelphia exhibit explores the fiery origins of science
Vermilion red, one of history's most prized pigments, came from mixing mercury and sulfide, then superheating it until it transformed. A new Philadelphia exhibit argues alchemists were running real experiments, not chasing fairy-tale gold.
— via WHYY, Maiken Scott
