Researchers at ETH Zurich have unveiled a new mechanism in the brain that mediates the decision between exercise and snacking. The scientists were surprised to find that a chemical messenger called orexin plays a crucial role in this process. This insight could lead to new, more effective strategies meant to promote physical activity in populations greatly affected by the obesity epidemic. Orexin: A Decision-Making ChemicalImagine standing at a crossroads: to exercise or to enjoy a delicious strawberry milkshake? For years, scientists have pondered what happens in our brains at this moment of …