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Researchers have solved the structure of a DNA-protein complex that is crucial in the spread of antibiotic resistance among bacteria. Knowing this structure also provides fundamental insight into how cells successfully divide into two new cells with intact DNA.

Researchers are seeking participants for a clinical trial examining whether two polyunsaturated Omega-3 fatty acids are effective treatments for depression. The two fatty acids being studied -- docosahexanoic acid (DHA) and eicosapentanoic acid (EPA) -- are found naturally in fish oil, flaxseed and walnuts. Previous studies have indicated that nutritional supplements that contain Omega-3 fatty acids can be an effective treatment for depression.

To replace worn-out cells, having the neighboring cell split into two identical daughter cells would seem to be the simplest way to keep bodies from falling apart. Instead, multicellular organisms use a seemingly inefficient, multi-step process to replace lost cells. That longer process is a defense against cancer, according to new research.

Should we drink at least eight glasses of water a day? Does shaving hair cause it to grow back faster or coarser? Does reading in dim light ruin your eyesight? These are just some of the common medical myths that are unproven or untrue, according to a new study.

Sex education greatly boosts the likelihood that teens will delay having intercourse, according to a new study that is the first of its kind in years. Male teens who received sex education in school were 71 percent less likely -- and similarly educated female teens were 59 percent less likely -- to have sexual intercourse before age 15. Males who attended school, meanwhile, were 2.77 times more likely to rely upon birth control the first time they had intercourse if they had been in sex-education classes.

New research may someday help natural-products chemists decrease by years the amount of time it takes for the development of certain types of medicinal drugs. The research involves computations of optical rotation angles on chiral -- non-superimposable -- molecules. Many chiral molecules are important for medical treatment for illnesses ranging from acid-reflux to cancer. The term "chiral" means that two mirror images of a molecule cannot be superimposed onto each other. In other words, some are "left-handed" and some are "right-handed."

Scientists have developed a radically new technique that uses lasers and non-linear optical effects to detect malaria infection in human blood. The researchers say the new technique holds the promise of simpler, faster and far less labor-intensive detection of the malaria parasite in blood samples.

A genetic mutation promotes hardening of the arteries. The researchers found that mice engineered without the Akt1 gene and fed a high cholesterol diet had many more signs of aortic atherosclerosis compared to their littermates. And, surprisingly, their coronary lesions were similar to humans, say the scientists.

New generation active computer games stimulate greater energy expenditure than sedentary games, but are no substitute for playing real sports, according to a new study.

People age 65 and older who regularly walk and get other forms of moderate exercise appear to significantly lower their risk of developing vascular dementia, the second most common form of dementia after Alzheimer's disease.