You walk into brain break and survey your options. If you’re faced with the choice between an apple and a brownie, chances are your instincts will guide you towards the brownie; try as we might, we just can’t stop reaching for fat and sugar. Human evolutionary biology professor Daniel E. Lieberman '86 is an expert on the evolutionary logic behind these patterns. In his newest book, "The Story of the Human Body: Evolution, Health and Disease," Lieberman tells us about the evolutionary causes and effects of “mismatch diseases,” which occur as a result of long-term changes in our environment but not our bodies. We spoke with Lieberman about his book and what it might mean for college students in their day-to-day lives.