A new study from Yale University showed that foods that combine fats and carbs make the brain go haywire, triggering our brain’s rewards center in ways far beyond what people get from foods that contain either ingredient alone. The researchers noted that modern fat + carb foods, such as cheeseburgers, pizza and donuts, befuddle the brain, which evolved when people foraged for food and rarely ate different foods at the same meal. And it helps explain why so many of us are obese and why we overeat even when we’re not hungry.