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NASA scientists report the MarCO satellites, two CubeSats in deep space, have lost contact with Planet Earth.

When NASA's InSight lander was on its seven-month trip to Mars, it wasn't alone. Two suitcase-size spacecraft, called MarCO, followed InSight on its journey. They were the first cube satellites to fly into deep space. And now, they've fallen silent.

  1. CNN (Image)