This picture taken in March 2018 shows a technician working on the clock of the Lukaskirche Church in Dresden, eastern Germany. This weekend, Americans will wind back this clocks as daylight saving time ends. Sebastian Kahnert/DPA/AFP via Getty Images hide caption
Of parents who tell pollsters their teens have trouble sleeping, 23 percent say the kids are waking up at night worried about their social lives. A third are worried about school. All-night access to electronic devices only aggravates the problem, sleep scientists say. 3photo/Getty Images hide caption
You've been there, and you know it doesn't feel good. But an app based on the science of circadian rhythms could help reduce the suffering of jet lag. iStockphoto hide caption