"Major milestone": NASA's Ingenuity mini-helicopter makes it through first night alone on frigid Mars surface ahead of historic flight attempt April 6, 2021 / 5:49 AM / AFP NASA's Mars helicopter prepares for flight NASA's Ingenuity mini-helicopter has survived its first night alone on the frigid surface of Mars, the US space agency said, hailing it as "a major milestone" for the tiny craft as it prepares for its first flight. Safe & sound on the surface of Mars: the #MarsHelicopter, Ingenuity, has survived the first cold night on its own, a major milestone for the small rotorcraft be...