The Pentagon's Super-Fast Robot Now Runs on Its Own

Last year, DARPA unveiled Cheetah: a robot that could run faster than Usain Bolt. Now, the same team has managed to create a version that doesn't need a power cord, making the electronic beast free to roam wherever it chooses. Be afraid. Be very afraid. »10/04/13 6:33am10/04/13 6:33am