It's not easy to blame childhood obesity on sunsets but scholars at the London School of Hygiene and Tropical Medicine and the University of Bristol say that later daylight couldn't hurt - and they even defend daylight savings time, which most people can't find much good to say about.
The scholars analyzed the lifestyles of over 23,000 children aged 5-16 years in nine countries; England, Australia, USA, Norway, Denmark, Estonia, Switzerland, Brazil and Madeira and Portugal. They looked for associations between the time of sunset and physical activity levels, measured via waist-worn accelerometers; electronic devices that measure body movement.