NASA's Next Mars Lander Won't Launch in 2016, Leaky Instrument to Blame

NASA has called off the planned March 2016 launch of a Mars lander, saying one of the spacecraft's key instruments cannot be fixed in time for liftoff. Because Mars and Earth align favorably just once every 26 months, NASA's InSight Mars lander now must wait until mid-2018 to begin its mission to characterize the Red Planet's interior in unprecedented detail — if the spacecraft gets off the ground at all. "That's all forward work," John Grunsfeld, associate administrator for NASA's Science