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Opponents of xenotransplantation research have begun a lawsuit against the US Food and Drug Administration (FDA), demanding that more information be made public about experiments in which humans receive transplants of animal tissue.
Joint research projects between Israeli and Arab scientists are continuing despite the current confrontation, but at a reduced level, scientists in the region say.
Christopher Surridge reports on the identification of the first gene that affects how plants respond to global changes in the composition of the atmosphere.
The international effort to halt ozone depletion through legislated reductions in the use of chlorofluorocarbons (CFCs) has been a success, according to leading climate researchers who met near Buenos Aires last month.