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The Nobel Prize in Physiology or Medicine was awarded this year to three American scientists who solved a problem of cell biology with deep relevance to cancer and aging. The three will receive equal shares of a prize worth around $1.4 million.

Ardi lived 4.4 million years ago in the woodlands of East Africa. She spent most of her time in the trees. She stood about four feet tall, weighed 110 pounds, and had long arms, short legs, and a grasping big toe that was perfect for ...

Down under in Australia, down underground, scientists have found 850 previously unknown species living in subterranean water, caves and micro-caverns.

For the first time, an experimental vaccine has prevented infection with the AIDS virus, a watershed event in the deadly epidemic and a surprising result. Recent failures led many scientists to think such a vaccine might never be possible.

The World Health Organization and the U.N.

Scientists launched a rocket experiment aimed at creating artificial high-altitude clouds on Saturday evening, sparking reports of strange lights in the sky.

A cream allowing erectile dysfunction drugs to be applied directly could make them safer, scientists say.

Screening for lung cancer could soon be as easy as a simple breath test. Scientists in Israel have developed an innovative sensor that uses gold particles to detect lung cancer in a patient's breath.

Had a particularly stressful day at work? Go home and mow your lawn. Scientists have found that a chemical released by freshly cut grass makes people feel content, London's Daily Mail reported.

Scientists have known for some time that people who constantly worry tend to die at a younger age than others, but the cause wasn't clear.

Scientists who discovered a 150-million-year-old squid on a dig in Trowbridge, Wiltshire, use its ink to draw.