science:

Planets are not cube-shaped. There’s no physical mechanism that would allow a cubic planet to form naturally, certainly not one the size of Earth, and even if you somehow built one, gravity would eventually turn it into a sphere. This is nothing more than a light-hearted thought experiment. But assuming you had a cube-shaped Earth, what would it be like?

If you were dropped in the middle of one of the six faces, you’d be standing in an ocean, because that’s where all the water would go, in the middle. If you move out of the ocean, you’d face a very, very steep climb up one of the mountains that form the corners, jutting out of the planet’s atmosphere. If there was life on this planet, it would most likely evolve independently on each face, separated by impossibly high mountains. On top of one of the corner-mountains, you’d have a spectacular view:

On the plus side, the view is like none on earth, or on any planet anywhere. You can sight down one edge of the cube to a far corner, a distance of some 6,400 miles. Even more strikingly, you see all the atmosphere and water has been concentrated by gravity into a blob in the middle of each face, with the corners and edges poking out into space. You realize your cubical planet isn’t one world but six, each face’s segment of the biosphere isolated from the others by the hopeless climb.

Too bad none of this could happen in reality.