The tricky part - > temperatures that regularly swing between -427 and 250 [F] - while bouncing its way through potholes, over small rocks, etc. When even a

The tricky part - > temperatures that regularly swing between -427 and 250 [F] - while bouncing its way through potholes, over small rocks, etc. When even a "minor" failure might kill astronauts. Is there a cryometallurgist in the house?