Satellites launched with $1bn Mars mission send 1st signals
Mars Cube One (MarCO), a pair of briefcase-sized satellites launched along with NASA's InSight Mars lander on Saturday, have sent first signals from space. While the $1-billion InSight mission will dig deep to study quakes and the Red Planet's formation for the first time, MarCO will follow InSight in a separate mission, becoming the first-ever CubeSats headed into deep space.