PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Robotic knee. Researcher Hugh Herr adjusting a robotic prosthetic knee. This knee reproduces the force response movements of a real human knee more accurately than standard prostheses, enabling its wearer to walk more naturally, even over difficult terrain. Herr, a double amputee, is one of the knee's developers. Photographed at the Massachusetts Institute of Technology, Cambridge, USA.
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