"It really raises the question of what should be considered normal ageing," says Kenneth Manton, a demographer from Duke University in North Carolina.

北卡罗来纳州杜克大学人口统计学家肯尼斯·曼顿说：“这确实引发了一个问题，即什么是正常的老龄化。”

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But a group of medical economists led by Kevin Schulman, of Duke University in North Carolina, doubts the feasibility of this goal.

但一群由北卡罗琳娜杜克大学凯文·舒尔曼领导的医疗经济学家怀疑该目标的可行性。

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The team from Duke University in North Carolina created autistic mice by mutating the gene which controls production of the protein, Shank3.

来自北卡罗莱纳州杜克大学的研究小组，通过对控制蛋白质生成的基因“shank3”进行变异，从而令老鼠出现自闭症。

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She also taught at the University of California at Santa Cruz, Saint Mary's College of Maryland and Duke University in North Carolina.

VOA: special.2010.04.18

Researchers at Duke University in North Carolina have developed a small pouch made of foil and plastic.

VOA: special.2010.05.24

Romulo Fuentes of Duke University in North Carolina led the researchers.

VOA: special.2009.04.07

Meanwhile, Andrew Read, a marine biologist at Duke University in North Carolina, is following 45 tagged loggerhead turtles.

ECONOMIST: Oceanography

Scientists at Duke University in North Carolina worked with engineering students and a taxidermist to operate the wings of a deceased swamp sparrow.

BBC: 'Robosparrow' created from dead bird

However, work by Laura Carrel, at Pennsylvania State University, and Huntington Willard, at Duke University in North Carolina, now shows that this inactivation is not complete.

ECONOMIST: Genetics