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Eindhoven University of Technology researcher Anne Hélène Gélébart shows the walking device. This small device is the world’s first machine to convert light directly into walking, simply using one fixed light source. (Photo credit: Bart van Overbeeke) Scientists at Eindhoven University of Technology in the Netherlands and Kent State University have developed a new material that can undulate and therefore propel itself forward under the influence of light. To achieve this, the scientists clamp a strip of this polymer material in a rectangular frame. When illuminated, it goes for a walk all on its...