exposure

Spring light influences teen sleep TROY, N.Y., Long daylight hours in spring influence the sleeping patterns of teens, researchers at Rensselaer Polytechnic Institute in Troy, N.Y., said. "Biologically, this increased exposure to early evening light in the spring delays the onset of nocturnal...

Mental health issues, 1 in 5 preschoolers BOSTON, (UPI) -- More than 20 percent of U.S. kindergartners and first-graders demonstrate mental health issues, researchers found. Dr. Alice S. Carter of the University of Massachusetts in Boston and colleagues said the study involved 1,329 healthy...

Pollution may not up pre-eclampsia risk SEATTLE, (UPI) -- Exposure to air pollution during pregnancy does not appear to increase the risk of preterm delivery or pre-eclampsia, a U.S. researcher says. Carole Rudra of the University at Buffalo in New York says strong evidence that air pollutants...