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Birth size, and in particular birth length, correlates with subsequent risk of breast cancer in adulthood, according to a new study in PLoS Medicine.

Move over, Viagra! Researchers in report that an ancient Chinese herbal remedy known as "horny goat weed" shows potential in lab studies as source for new future drugs to treat erectile dysfunction (ED). The study, which provides scientific evidence supporting the herb's well-known use as a natural aphrodisiac.

Air quality regulations may not effectively target a large source of fine, organic particle pollutants that contribute to hazy skies and poor air quality over the Los Angeles region.

A protein that helps keep immune cells quiet is more abundant in the spinal fluid of patients with multiple sclerosis (MS), further boosting suspicion that the protein, TREM-2, may be an important contributor to the disease.

New technology for screening and even diagnosing sleep disorders has been developed. The first application of the new technology, a smart alarm clock for mobile phones, HappyWakeUp, is now available. It monitors depth of sleep and provides a gentle wake-up whenever possible.

A study of the first approximately 100 patients who have received partial breast irradiation with a small, whisk-like, expandable device inserted inside the breast has shown that after one year, the device is effective at sparing nearby healthy tissue from the effects of radiation. The device, called SAVI, is aimed at providing customized radiation therapy while minimizing exposure to healthy tissue around the breast after a woman has received a lumpectomy for early stage cancer.

Common strains of tuberculosis-causing bacteria have hijacked the human body's immune response to play tricks on cells in the lungs, scientists say. The results of this takeover are mixed. The cells essentially welcome the bacteria into the lungs and invite them to stay a while, meaning the human host becomes infected with the TB bacterium. But in about 90 percent of these cases, the infection remains latent and the infected person never has any symptoms of illness.

Researchers are reporting that new insights into the composition of human breast milk may lead to new ways to prevent and treat stomach illnesses and other diseases in babies and adults. 

Parents who smoke cigarettes around their kids in cars and homes beware -- second-hand smoke may trigger symptoms of nicotine dependence in children. The findings are published in the September edition of the journal Addictive Behaviors in a joint study from nine Canadian institutions.

Researchers have known that age of first drink (AFD) is associated with the later development of alcohol-use disorders (AUDs). New findings show that an early AFD, before the age of 15, is especially risky for later AUDs. Experts recommend delaying the onset of drinking behavior as late as possible, until 18 or older.