Sky and Telescope Meet Valkyrie, NASA’s space robot Meet Valkyrie: She’s 6 feet and 2 inches tall, weighs about 300 pounds, and cost $2 million — and one day this humanoid space robot, or more likely her much more advanced descendant, might help humans colonize Mars. NASA has provided MIT and Northeastern University with Valkyrie prototypes for further development; Northeastern’s Valkyrie is hosted […]