Ecstasy, cocaine, speed, heroin, alcohol, nicotine and caffeine – In a 26-page special of Cosmos Magazine, we look at the drugs that permeate and plague society. What do drugs do to your brain? Is addiction a disease, and should we use controversial new drug vaccines as a preventative measure? We bring you up to date with the latest research on recreational drugs. We also discover links between music, evolution and sex; a plethora of exotic stars found by the Kepler space probe; and the weird quantum behaviours of supercooled liquids. Plus, our special flip-cover guide shows you how to survive your postgraduate science degree.