That's especially important because NASA wants future moonwalkers to spend far more time roaming about than the Apollo astronauts did during their short visits.

NPR: NASA's Future Spacesuits Are Made for Walking

His book "Voices From the Moon" is based upon interviews with the surviving Apollo astronauts, and he concludes there's no "lunar syndrome" that's sent the moonwalkers down paths odder than any dozen former colleagues in other lines of work.

CNN: After walking on moon, astronauts trod various paths

And the first man to leave footprints in the lunar dust, Apollo 11 Commander Neil Armstrong -- aside from geologist Schmitt, the only other civilian in the collection of moonwalkers -- later sat on several corporate boards and the presidential commission that investigated the 1986 Challenger space shuttle disaster.

CNN: After walking on moon, astronauts trod various paths