Dec 11, 2013 — Student athletes know they need to avoid concussions. But hits that don't cause concussion symptoms can affect the brain, too. Researchers are now trying to figure out who is most at risk from those smaller hits, and if they can be warned in advance.
Dec 11, 2013 — People who have surgery or are hospitalized for serious illnesses sometimes develop dangerous staph infections. The culprits can be bacteria that were living on people all along. Scientists say the germs thrive in remote parts of the nose that aren't typically tested. Other benign microbes might help keep the bad ones at bay.
Dec 9, 2013 — Watching violent movies makes teenagers more aggressive, and that violence is almost always associated with sex, drinking and smoking. Violent characters in PG-13 movies are as likely to indulge in violent activities as those in R-rated flicks.
Dec 9, 2013 — When doctors stick electrodes into the brain of a patient with epilepsy, they're hoping to find a cure for debilitating seizures. But they're also exploring a still-mysterious landscape. And they couldn't do it without a patient willing to help.
Dec 5, 2013 — The notoriously short night's sleep that many tired adolescents get isn't all about surging hormones and too much homework, according to a sociologist who looked at shifting sleep patterns from ages 12 to 15. Teens who report good relationships with family and schoolmates tend to sleep better.
Dec 3, 2013 — A new kind of mammogram that takes many X-rays to make a three-dimensional image can help doctors find cancer and reduce false alarms. But it's still unclear who might benefit from the technique, and whether it's worth the higher cost and double dose of radiation.
Dec 3, 2013 — The proposition that some extra weight may not be a health worry has sparked a heated medical debate. Some studies have found that a little extra fat might have benefits. A new analysis suggests that for almost all people excess weight increases the risk of death and disease.
Dec 2, 2013 — Left-handedness has been linked to everything from early death to schizophrenia over the past 150 years. While the associations spark curiosity and sometimes concern, it's been difficult to draw solid scientific conclusions, one way or the other.
Dec 2, 2013 — The technological trials for the online health insurance exchanges have turned an enrollment period that was supposed to be a leisurely three-month stroll into a last-minute sprint for millions of Americans. People who want coverage that starts at the beginning of 2014 need to sign up no later than Dec. 23.
Dec 2, 2013 — Scientists agree that teenagers naturally go to bed late and sleep late, too. But high school start times are traditionally very early. Proponents of later start times say they're finally getting traction. The result, they say, will be happier kids who do better in school.