Once upon a time, mankind invented per- and polyfluoroalkyl substances (PFAS). These manufactured chemicals, developed in the 1940s, have such powerful qualities (water and oil repellent, resistant in high temperature or pressure environments) that they are now used everywhere for both domestic and industrial applications, from food packaging to aviation.
But they are toxic for living beings and for the environment – and are potentially present in the blood of 95-100% of the US population. Both genius and evil.