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...which they are learning, and in some cases relearning, rules of development. Until recently, the field has revolved around either embryonic stem cells - a remarkably plastic class of cells extracted from an embryo that could turn into any of the body's 200 tissue types - or their more restricted adult cousins, cells taken from mature organs or skin that were limited to becoming only specific types of tissue. On Jan. 23, after nearly a decade of preparation, the Food and Drug Administration approved the first trial of an embryonic- stem-cell therapy for a handful of patients paralyzed by spinal...
...today the field encompasses far more than just embryonic and adult stem cells; it has expanded into the broader field of regenerative medicine, and Melton's lab at Harvard is at the vanguard, bringing the newest type of stem cells, which do not rely on embryos at all, closer to the clinic, where patients will actually benefit. Last summer, Melton stunned the scientific community with yet another twist, finding a way to generate new populations of cells by reprogramming one type of fully mature cell so it simply became another, bypassing stem cells altogether. "If I were in high school...
...decision sent some leading scientists abroad, to Britain, Singapore and China, where the governments were more receptive to their work. Others who stayed behind but lacked private funding shifted their attention from embryos to the less versatile adult stem cells. Federally backed scientists, like Melton, who continued embryonic work were forced to adopt a byzantine system of labeling and cataloging their cell cultures and equipment so that government money was not used to grow forbidden cells - and government microscopes were not even used to look at them...
...help defray the additional expenses in several municipalities. Rockwell and Kaboom! are exploring how royalties from the Imagination Playground in a Box - the portable wonderlands cost approximately $6,500 a pop - can fund an endowment to cover one rather significant, ongoing cost: a paid Play Associate, i.e., a trained adult who can help direct play while ensuring that those loose parts don't go missing. "It's a model we've borrowed from England," Rockwell says. "That person is in charge of fostering collaboration and creativity...
...largest netizen population of 300 million, China is struggling with a new plight: Internet obsession among its youth. Since the 2004 establishment of the country's first Internet Addiction Center, the military-run boot camp in Beijing where Wang took her son, more than 3,000 adolescent and young-adult patients have been treated for Internet addiction. Hundreds of similar treatment centers have mushroomed in recent years in China, joining other centers operating elsewhere in Asia and the U.S. The U.S.-based Center for Internet Addiction Recovery classifies the disorder as compulsive behavior in which "the Internet becomes the organizing...