Would you like to make a contribution of historical proportions? Here's your chance. This challenge is to create technology that can literally help to reshape our world, liberate hundreds of millions of people from repression, and bring down evil regimes in the process. There are few...

Current prosthetic legs are expensive and only last 3 to 4 years. To win this challenge you must create a complete design for high-performance legs that will last for at least 5 years and that can be built for less than USD$1,000.00 Users must be able to run and sprint comfortably as well to...