Toward the end of his life, the professor became preoccupied with a hypothesis he referred to in his notes as “aquatic memory.” He argued that, under certain circumstances, water—the universal solvent—retained evidence, or “memory,” of the solute particles that had dissolved in it, no matter how many times it was diluted or purified. Even if years passed, or centuries, and not a single original molecule remained, each droplet of water maintained a unique structure, distinguishable from the next, marked forever
