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骋惭听()听补苍诲听骋辞辞诲测别补谤听()听have been over this dry, dusty ground before. Both companies worked on NASA’s original Lunar Roving Vehicles that went to the moon in the early 1970s. GM (then working with Boeing, instead of Lockheed Martin)听and the three lunar rovers they created are still up there sitting on Goodyear tires made from wire mesh.

Tires like the ones we use on Earth 鈥� made from rubber and filled with air 鈥� won’t work on the moon for a few reasons.

First, enormous temperature swings from up to …