In this Thursday, Dec. 12, 2013 photo, James Simard, a hardware designer and embedded programmer, listens to a colleague as they talk while working on developments to the Copenhagen Wheel, a ... more 
In this Thursday, Dec. 12, 2013 photo, James Simard, a hardware designer and embedded programmer, listens to a colleague as they talk while working on developments to the Copenhagen Wheel, a human/electric hybrid bicycle engine at Superpedestrian in Cambridge, Mass. Bicycles with prototypes of the hybrid engine, the red disks, hang on a wall at Superpedestrian. (AP Photo/Stephan Savoia) less 
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Associated Press | Photo By Stephan Savoia
Wed, Dec 18, 2013 2:25 AM EST