Research shows nearly 1 in 5 school-age children are using melatonin to help them sleep. But these supplements are unregulated and pediatricians worry about their safety and the dose.
Reasearch shows teens don't get sleepy until 10:45 or 11 p.m. But high school classes in Nashville still start at 7:05 a.m. "It's not a badge of honor," says the mayor.
Wondering how to prepare for sleep disruption? Should you take melatonin or other sleep aids? Here's answers from researchers and seasoned travelers — including NPR's international correspondents.
Scientists have learned that northern elephant seals — massive creatures found along the Pacific Coast of North America — cobble together a couple hours of sleep using underwater power naps.
A bipartisan group of senators wants to make daylight saving time permanent. But sleep experts say standard time is better, because it saves morning light and is more in sync with our natural rhythms.
Scientists analyzed the correlation between sleep activity and hot nighttime temperatures. A lack of sleep is a risk factor for physical and mental health problems.
Just a night or two of exposure to faint light is enough to raise your pulse and increase insulin resistance — factors that increase the risk of heart disease and diabetes, researchers find.