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...That's the theory, anyway. The effectiveness of cloud-seeding is still disputed, because it's difficult to say with any certainty that cloud-seeding is responsible for a storm rather than Mother Nature. But if you choose to believe in cloud-seeding, the Chinese scientists may have even overdone it. The snowstorm lasted for 11 hours, disrupting flights in and out of Beijing and hampering shipping off the Chinese coast. Still, expect few complaints from the generally dry region; it's the most accumulation the city's seen in a decade, and further proof the Chinese may be becoming...
...Robert Wilder published a study that found a link between exposure to anesthesia and surgery in infancy and learning disabilities later in life. Both doctors have since been approached with inquiries from concerned patients - but armed only with early data, neither can offer much reassuring advice. "What can I say? We don't have any answers," says Xie. "We have some troubling warning signs, but we cannot conclude that these drugs are causing brain damage in people...
...been a similarly frustrating situation for Wilder. "All we can say to parents, at the moment, is that you shouldn't do unnecessary procedures on kids - but we knew that already," he says. (Read "The Year in Medicine 2008: From...
...likelier explanation, he and others say, is a combination of factors, including changes in weather patterns. Fewer clouds and more sunlight would create a layer of warm air right at the glaciers' surface, which would cause some melting. But most of the ice loss, he suggests, is due to sublimation - that is, ice turning directly into water vapor with no intermediate step. That tends to happen when temperatures are cold and the air is extremely dry, which is the case at Kilimanjaro's higher-than-19,000-ft. summit (it's the same reason ice cubes slowly wilt away...
...That's not to say that Thompson's research is the final word on the debate. Indeed, glacier experts have been waging an intellectual war for years over what's really causing the ice loss atop Kilimanjaro. The simplest explanation would be that warming temperatures are making the ice melt - and indeed, Thompson believes this is a big part of what's going...