NASA’s Mars helicopter blades broke the sound barrier without disintegrating, and JPL may have unlocked the next leap in alien flight

NASA engineers spun next-gen Mars helicopter blades past Mach 1 without shattering them. See how JPL unlocked the future of alien flight.
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Nasa working on deploying six helicopters on Mars: All about Skyfall

These helicopters will assist in scouting safe landing zones for future robotic missions and, crucially, America's first ...