Obese teenage girls with a greater ratio of visceral fat (fat around internal organs) to subcutaneous fat (fat found just beneath the skin) are likely to have lower bone density than peers with a lower ratio of visceral to subcutaneous fat, according to a new study.

Space physicists have identified the impact of the Sun on Mars' atmosphere. The scientists report that Mars is constantly losing part of its atmosphere to space. The new study shows that pressure from solar wind pulses is a significant contributor to Mars's atmospheric escape.

Researchers are the first to fully characterize a special type of stem cell, endothelial progenitor cells (EPCs) that exist in circulating blood, to see if they can behave as endothelial cells in the body when cultured on a bioengineered surface. The results show promise for a new generation of tissue-engineered vascular grafts which could improve the success rate of surgery for peripheral arterial disease.

New research reveals for the first time how our brains coordinate two different types of attention and why we may be temporarily blinded by surprises.

Total knee arthroplasty patients may be able to participate in high-impact sports without increasing risk of early implant failure, according to a new study.

A low-cost water purification technique could help drastically reduce the incidence of waterborne disease in the developing world. The procedure, which uses seeds from the Moringa oleifera tree, can produce a 90.00% to 99.99% bacterial reduction in previously untreated water.

African-Americans age 65 and younger are more than twice as likely to have a stroke compared with Caucasians in any region, and people who have a stroke are more likely to die in the South than elsewhere, according to researchers.

Scientists have discovered a new mechanism that governs this pathway and in the process identified a novel potential therapeutic target for controlling fat metabolism.

Scientists have succeeded in growing empty particles derived from a plant virus and have made them carry useful chemicals. The external surface of these nano containers could be decorated with molecules that guide them to where they are needed in the body, before the chemical load is discharged to exert its effect on diseased cells. The containers are particles of the Cowpea mosaic virus, which is ideally suited for designing biomaterial at the nanoscale.

Scientists have discovered a previously unknown cellular "switch" that may provide researchers with a new means of triggering programmed cell death, findings with implications for treating cancer.