For some of us, the longest period in the world is between Monday and Friday, or the days after an exam when you have to wait for the grade to come out. But for others, the longest time is between lunch and dinner, since people tend to get hungry when dinner is still a few hours away. In fact, a survey found that up to 78 percent of people in the US usually have something to eat before dinner, as shown in the graphic on the right.
