This NASA robot may leave the 1st footprints on Mars

Four sister robots built by NASA could be pioneers in the colonization of Mars, part of an advance construction team that sets up a habitat for more fragile human explorers. But first they're finding new homes on Earth and engineers to hone their skills. The space agency has kept one Valkyrie robot at its birthplace, the Johnson Space Center in Houston. It has loaned three others to universities in Massachusetts and Scotland so professors and students can tinker with the 1.8-metre tall, 125-kilogram humanoids and make them more autonomous. One of the robots, nicknamed Val, still hasn't quite harmonized its 28 torque-controlled joints and nearly 200 sensors after arriving at a robotics centre at the University of Massachusetts-Lowell. Northeastern University Ph.D. student Murphy Wonsick adjusts the leg of a six-foot-tall, 125 kg Valkyrie robot at University of Massachusetts-Lowell's robotics centre in Lowell, Mass.