For your convenience, NASA has here superimposed a map of Aldrin and Armstrong's strolls around the Sea of Tranquility onto a standard baseball diamond.
They didn't cover too much ground, it turns out. Both stayed close to the mound where the Eagle set down, except for Armstrong's quick jaunt over to the rim of East Crater to shoot some photos of the outfield.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.