As a child in Trinidad, Trevor Castor read everything -- often at night, by lantern light after the power grid failed. When he had to learn to swim, he taught himself with a book. After years of research into the healthful effects of cannabis, his third company, Aphios Pharma, has patented a nanotechnology drug-delivery platform that helps patients with cancer, infectious diseases, and central nervous system disorders absorb and maintain the pain maintenance of cannabis six to eight times more efficiently.