Science and technology

Associated Press
Mark-Andre Duc, a partially tetraplegic patient, is seen on a laptop screen as he talks to scientists in Switzerland's Federal Institute of Technology in Lausanne, Switzerland, Tuesday, April 24, 2012. From a hospital 100 kilometers (62 miles) away, he imagined lifting his fingers to direct a robot. Swiss scientists demonstrated with this test how a partially paralyzed person can control a robot using brain signals alone. (AP Photo/Anja Niedringhaus)

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