PARIS--Controversy has erupted over the South African government's decision to withhold the antiviral drug AZT from pregnant women infected with HIV--despite the compound's demonstrated effectiveness at preventing transmission of the virus to offspring.
Tomorrow is the 69th birthday of Seiya Uyeda, a Japanese geophysicist known for his contributions to plate tectonics. From 1957 to 1964, Uyeda studied island arcs, the series of island chains along the northern and western Pacific that have deep trenches along their ocean sides.
The Galileo spacecraft unexpectedly shut down on 22 November, just before it was to fly by Europa. NASA engineers had the spacecraft operating normally a day later, but they lost a chance to observe the Jovian moon, which appears to harbor an ice-covered ocean that may hold primitive life.
Bone marrow transplants can be a lifesaver, replenishing the source of blood cells after radiation or chemotherapy destroys it. But for some patients with blood disease, no matching donor can be found.
PARIS--The number of people infected with HIV rose 10% this year, to an estimated 33.4 million worldwide, according to a report released today by the Joint United Nations Programme on HIV/AIDS and the World Health Organization.
Burton Richter, director of the Stanford Linear Accelerator Center (SLAC), announced this week that he will be resigning the post next August. After 15 years at the helm, "it's time for a new team to take over," says Richter, 67.
A protein involved in cancer can also stimulate new hair growth in mice, suggesting a possible approach for curing baldness. The protein, called b-catenin, is part of a biochemical pathway that leads to most cases of colon cancer.