Ten weeks after an 18-year old Arizona man died in a gene therapy experiment at the University of Pennsylvania, scientists there have determined that the treatment he received - an infusion of

A simple leak in a warhead's "plumbing" foiled the test last month of an experimental inerceptor central to the Pentagon's effor to develop a missile-devense system at a cost of $12.7 billion ,

Brain scans of US soldiers who believe they suffer from Gulf War illness indicate that their brains were damaged by chemical exposure during the 1991 conflict, researchers reported

Is AIDS a disaster inadvertently brought on by humans that arose from early testing of a polio vaccine in Africa in the 1950's? This provocative theory seemded farfetched when it came to public

Thousands of people on the Vanuatan island of Pentecost faced food and water shortage after a powerful earthquake followed by a tsunami struck the South Pacific nation, killing eight

The United States has used conflict-resolution mechanisms set up by the North American Free Trade Agreement to force Ontario to drop a two-year-old regulation that said that non-Canadian anglers

Joseph Stiglitz's resignation as the World Bank's chief economist removes from Washington perhaps the most outspoken voice in the debate over rich countries can best aid economic development in poor

The Agriculture Ministry confirmed that it has submitted a report on British beef to the French national food safety agency, which is expected to announce "within 10 days" whether it recommends

Bill Gates, the multibillionaire founder of Microsoft Corp. has announced that his charitable foundation will give $750 million over the next five years to try to improve the health of young children

For most of its 17 years, Operation Smile seemed a model charity. But over the last two years, serious allegations of shoddy medical practices and questions about the charity's direction and conduct