The tiny helicopter Nasa built to survive 30 days on Mars ended up flying for nearly three years The Times of IndiaNASA’s Supersonic Helicopter Pushes Boundaries on Mars YahooNASA’s Mars helicopter was built to prove that flight was possible in an atmosphere one percent as thick as Earth’s, and it was expected to manage five flights over thirty days, but it flew 72 times across almost three years before a hard landing shattered its rotor Space Daily
