Environment: Abuzz over Bees

New theory on yellow rain

For the past two years, the U.S. Government has been urgently seeking to convince the world that the Soviet Union has been guilty, in Afghanistan and Southeast Asia, of violating international bans on chemical warfare. The alleged weapon: "yellow rain," a lethal spray of poisons. The Soviets have denied the charge, and a United Nations panel was unable to confirm it. Now, to the considerable embarrassment of U.S. officials, a group of respected scientists has offered a new theory. Said Harvard Biochemist Matthew Meselson last week at a meeting of the American Association for the Advancement of...