Mach 20 in Mph - 搜索视频

From mach-20 glider to hummingbird drone

TEDRegina Dugan

From mach-20 glider to hummingbird drone

"What would you attempt to do if you knew you could not fail?" asks Regina Dugan, then director of DARPA, the Defense Advanced Research Projects Agency. In this breathtaking talk she describes some of the extraordinary projects -- a robotic hummingbird, a prosthetic arm controlled by thought, and, well, the internet -- that her agency has ...

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