Why People Behave

You lace up your running shoes for a familiar 5K loop through the neighborhood. The morning air is crisp, your legs feel unusually light, and you power up the final steep hill with every ounce of str…

You sit down for lunch and, almost instinctively, reach for your phone to scan the barcode on your salad dressing. Before taking a single bite of an apple, you log its estimated weight and variety in…