Chemists think that methylene blue, a common dye that is found in wastewater, can power batteries. Anjula Kosswattaarachchi, now a PhD candidate in chemistry at the University at Buffalo, used to ...

Robert F Kennedy Jr, the presumptive US health chief, was recorded on a flight using a pipette to add droplets of the cobalt-blue liquid to his drink. The 72-year-old, known as RFK Jr, is not ...