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MODEL RELEASED. Virtual reality interface. Researcher Peter Berkelman using a virtual reality (VR) haptic (touch) interface. The joystick he is moving is levitated above eight powerful magnets. These provide variable forces that simulate the touch and movement of virtual three-dimensional objects seen on the computer monitor. Photographed at the Robotics Institute, Microdynamic Systems Lab, Carnegie Mellon University, USA. (KEYSTONE/SCIENCE PHOTO LIBRARY/PETER MENZEL)