12 Things you learned in school that have since been proven wrong

Sugar is as addictive as cocaine

This comes from the bestselling book by Dr. Robert Lustig, Fat Chance. First published in 2009, it claimed that sugar stimulates the brain’s reward system in much the same way as drugs do, such as cocaine, heroin, and alcohol. One problem though, although sugar may, in fact, trigger dopamine, no scientific studies using neuroimaging have ever backed up this claim.