A new study calls into question widely publicized U.S. results earlier this year suggesting that the drug tamoxifen prevents breast cancer in women at high risk of developing the disease. British

These days, industrialists and politicians are locked in an extraordinary debate about the possible extinction of a haven created not for wildlife but for big business: one of South America's largest

A U.S. district court has shot down a law professor's attack on export restrictions for encryption software. The decision is a blow to opponents of U.S. federal laws governing overseas sales of the

Doctors at the University of Pittsburgh Medical Center said they have performed the first transplant of human nerve cells into a patient's brain in an effort to reverse paralysis and other effects of

Paul Brown has developed a technology that enables voice and data on the same wire as household lights. The system can transmit at least one megabit of data per second, 20 times as fast as high-speed

Southern Co.'s Southern Energy Co. unit and Johnston Development Co. signed an agreement with Shanxi Enhua Energy Co. to develop a $500 million power project in

Two competing Russian groups, Ecoresoursy and VNIRO, say they have figured out how to make caviar without killing the fish. In both cases, the sturgeon gets a hormone injection to make it ovulate,

U.S. President Bill Clinton on his visit to Shanghai, added a strong environmentalist caveat and implored the nation to "ensure that economic development does not lead to environmental catastrophe."

The U.S. Food and Drug Administration approved the use of acesulfame potassium, a noncaloric sweetner, for use under the brand name Sunett, the sweetner is already an ingredient in soft drinks sold

Researchers presented disturbing reports that some people have contracted new strains of the AIDS virus that are resistant to some of the powerful drug combination therapies that have revolutionized