In 1970, marijuana was classified as a schedule 1 drug in the United States: the strictest designation possible, meaning it was completely illegal and had no recognized medical uses. Today, marijuana's therapeutic benefits are widely acknowledged, but a growing recognition for its medical value doesn't answer the question: is recreational marijuana use bad for your brain? Anees Bahji investigates. This is a TED-Ed lesson directed by Anton Bogaty, narrated by Addison Anderson, with music by Bamm Bamm Wolfgang.