6. Nissan Cube
Most extraterrestrial worlds are spherical; all you have to do it look at the full moon on a clear night for proof of the universe’s penchant for roundness. The earth, sun, moon, Jupiter and Kepler-20f are all spheres, just like beach balls, except they’re not contained within the margins of a bin made of plastic pipe and elastic cord.
Flipping convention the bird is Nissan’s Cube. This diminutive box on wheels comes from a world with six identical sides, and each one of them is flat. The car looks like a craps table die sans any dots. Apparently in Japan right angles and straight lines are popular, but what else can you expect from the country that invented square watermelons?