Boeing eventually did come up with a “1 G” rover, but it was prone to breaking and couldn’t actually sustain field simulations. NASA spent $1.2 million on it. According to USGS’s Gerry Schaber, “when Don Beattie [the boss] asked Putty [charged with building Grover] how much did this thing cost, Putty said, ‘something like $1,900.’ Beattie said, oh we couldn’t say that to NASA Headquarters — so they multiplied the cost by about 10 and claimed that we built it for $20,000 — still a great bargain.” Here, astronaut Jack Schmitt participates in a final geology exercise with the Grover before Apollo 15 at Coconino Point, Territory of the Navajo Nation, Arizona in June 1971. Schmitt was the only geologist who would also become an astronaut