http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Fueled by caffeine teens are up late at night, and they aren`t just focusing on homework. Web surfing, text messaging and gaming are keeping them up for hours into the night, according to a recent study by Drexel University`s Dr. Christina Calamaro, assistant professor in Drexel`s College of Nursing and Health Professions. http://www.physorg.com/news167326020.html Medicine & Health Mon, 20 Jul 2009 16:40:09 EST news167326020 A landmark study led by North Carolina State University researchers shows that African-American seniors who have trouble falling asleep are at higher risk of having memory problems - raising the possibility that identifying and treating sleep difficulties in the elderly may help preserve their cognitive functioning. The study is the first to examine the link between sleep and cognitive functioning in older African-Americans. http://www.physorg.com/news143198940.html Medicine & Health Tue, 14 Oct 2008 10:29:00 EST news143198940 Difficulty falling asleep and staying asleep increase as women go through menopause according to research by Rush University Medical Center. Waking up earlier than planned also increases through late perimenopause but decreases when women become postmenopausal. The study is published in the July 1 issue of the journal SLEEP. http://www.physorg.com/news134135697.html Medicine & Health Tue, 01 Jul 2008 12:54:57 EST news134135697