A school dropout from a poor family in southern India has revolutionised menstrual health for rural women in developing countries by inventing a simple machine they can use to make cheap sanitary pads. Arunachalam Muruganantham's invention came at great personal cost - he nearly lost his family, his money and his place in society. But he kept his sense of humour. "It all started with my wife," he says. In 1998 he was newly married and his world revolved around his wife, Shanthi, and his widowed mother. One day he saw Shanthi was hiding something from him. He was shocked...
