NASA is working to salvage the heat probe on the space agency's InSight Mars lander. The hope is that with the aid of the lander's robotic arm, the self-hammering probe can be freed from the stuck ...

The duricrust soil is covered by one to two centimetres of Martian dust and sand, with a layer of volcanic sand and debris below. On the right, the filled pit, traces from the lander's gripper arm can ...