NASA's Mars 'mole' is finally digging again, but just barely

NASA's InSight lander mole is digging into the surface of Mars once more, but progress is slow and complicated. The mole is designed to dig as deep as 16 feet, but it has repeatedly failed to make progress. With the robotic lander pushing on the probe, it is slowly catching a grip. Visit BGR's homepage for more stories. A NASA instrument that has repeatedly failed to accomplish the task it was designed to do may finally be working. The self-hammering "mole" probe attached to the InSight lander o...