Word: biologists
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Using biochemical tools that were not available at the beginning of the epidemics in Africa and the Americas, molecular biologist Chin-Yih Ou and his colleagues at the U.S. Centers for Disease Control found two distinct epidemics caused by somewhat different strains of HIV in the northern Thai city of Chiang Mai. Both epidemics started no more than four years ago, but one occurred mostly in intravenous drug abusers and the other started in female prostitutes. There was little overlap between the two groups...
Cattle ranching is destroying tropical forests. Without question, ranching is a factor in tropical deforestation, and a major one at that. But University of Pennsylvania biologist Daniel Janzen, for one, believes that this unfortunate epoch in the history of Latin America is rapidly drawing to a close. In Costa Rica, he says, "most of the pastureland that was easily cleared of forest has already been cleared." At the same time, the remaining forest has begun to rise in value. "Two decades ago," explains Janzen, "the choice was simple. Either the forest stood there, or someone tore it down to plant...
Harrison said that although McMahon is notcoming to Harvard from a university post, he isconfident the biologist will make a "first rate"teacher. He said McMahon has taught classes atCold Spring Harbor Biological Laboratories in NewYork and at the Marine Biology Laboratory in WoodsHole, Mass...
...Jurassic Park, Michael Crichton's technothriller about cloned dinosaurs, the author asked a fairly serious question: Is it wise to let commercial technicians meddle with genetic engineering? It did not require a molecular biologist to work out his answer: Only if you think you can run faster than whatever Bacillus or tyranosaur they manage to hatch...
Animal sex, however, is a more recent invention. Biologist Lynn Margulis of the University of Massachusetts at Amherst believes the evolutionary roots of egg and sperm cells can be traced back to a group of organisms known as protists that first appeared some 1.5 billion years ago. (Modern examples include protozoa, giant kelp and malaria parasites.) During periods of starvation, Margulis conjectures, one protist was driven to devour another. Sometimes this cannibalistic meal was incompletely digested, and the nuclei of prey and predator fused. By joining forces, the fused cells were better able to survive adversity, and because they survived...