NASA’s Launching a Lander That Will Dig on Mars
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InSight will accomplish this feat with its Heat Flow and Physical Properties Package (HP3), nicknamed “the mole” because it can burrow through regolith (the loose rocky surface layer on Mars and many other terrestrial planets). The instrument consists of a tube with a spring-loaded mechanism that will hammer out a hole in half-meter increments. Every 50 centimeters, it will stop for several hours or days to take thermal measurements and cool down from the frictional and operational heat generated by the dig process.
Source: vice.com
