The space agency NASA has managed to launch space shuttles safely with a reduced work force, but critical shortages of skilled engineers and unhurried efforts to replace them could pose increases

At least 35 people have died in flooding from rains that have swamped parts of southern Africa and cut major road links, television and radio stations reported Thursday. The South African emergency

The growing problem of dirty air over national parks is diappointing tourists and keeping some away, costing nearby businesses millions of dollars in lost revenue, a study commissioned by several

Starting next week some surgery patients at the Beth Israel Deconess Medical Center in Boston will be asked to allow leftover tissue from their operations to be sent to a Massachusetts biotech

A California start-up company is introducing a web site this week that will recruit people to donate their DNA to help find genes that cause disease. The company, called DNA Sciences, has James

American and British officials have accused the presidents of Liberia and Burkina Faso of taking a personal role in trading arms for diamonds in violation of a UN embargo. They also said the two

Rising sands are part of a new desert forming in Lagan on the eastern edge of the Qinghai-Tibet Plateau. The spread of wastelands on these 9,000-foot high steppes, and across the pastures and farmed

Convinced that the global spread of AIDS is reaching catastrophic dimensions, the Clinton Administration has formally designated the disease for the first time as a threat to U.S. national security

A vaccine-like treatment wiped out or shrank tumors in patients whose kidney cancer had spread elsewhere in their bodies, according to a new study. Researchers familiar with the work called the

A team of scientists has announced the use of stem cells --"master cells" that are the source of new cells in the body-- to reverse diabetes in mice. The team, at the University of florida in