Frequent testing and treatment of infection does not reduce the prevalence of chlamydia in urban teenage girls, according to a long term study.

Scientists are developing new ways to replace harmful, carcinogenic, toxic acids and electrolytes which are currently used in many commercial metal finishing and energy storage processes.

Researchers have identified the first biomarker of graft-versus-host disease of the skin. The discovery makes possible a simple blood test that should solve a treatment dilemma facing doctors with patients who frequently develop rashes after bone marrow transplants.

A recent study about movement of bird species during the Cold War outlines one of the perils facing an expanding global economy -- along with international trade comes the potential for a significant increase in invasive species that can disrupt ecosystems.

Researchers have discovered a previously unknown mechanism that may drive the early brain function deterioration of Alzheimer's victims, thus opening a new exploratory path in the quest for an Alzheimer's cure. The research also demonstrates how the unique application of an existing cell research technique could accelerate the discovery of treatments to exploit the new findings.

The teeth of a 30,000-year-old child are shedding new light on the evolution of modern humans, thanks to new research.

Amid concerns regarding terrorists targeting airliners using weapons less detectable by traditional means, the Transportation Security Administration (TSA) is ramping up deployment of whole body scanners at security checkpoints in US airports. These systems produce anatomically accurate images of the body and can detect objects and substances concealed by clothing.

Medical researchers have made a major breakthrough in understanding a group of deadly disorders that includes the disease made famous in the movie "Lorenzo's Oil."

Researchers have developed a novel mathematical model that predicts the spread of the H1N1 virus on long airplane flights could be significant, particularly if the infected individual travels in economy class.

Researchers have found in animal experiments that an antidepressant developed over 40 years ago can blunt and even reverse the muscle enlargement and weakened pumping function associated with heart failure.