Puzzle Building 101 says to start with the corners and then find the edges. From there you fill in until your 1,000-piece masterpiece is complete. Throw all that knowledge out the window when you embark on assembling the Moon Puzzle. The 186-piece puzzle has no corners, no edges, and no end point. Yes, you read that correctly. There is no end to this puzzle. It can be configured in endless ways. Based on photographs from NASA’s Lunar-Reconnaissance Orbiter, the puzzle has no fixed shape, so you can attempt to assemble the astronaut, space shuttle, and lunar lander pieces in any amoeba-like way you can work out. Made from birch plywood, the Moon Puzzle just keeps going—like outerspace.