A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.

For example a cube has 6 faces ... Her shape must be a square-based pyramid. The base of this shape is a square, which we know from its name. The other four faces are all triangles.

For example a cube has 6 faces ... Her shape must be a square-based pyramid. The base of this shape is a square, which we know from its name. The other four faces are all triangles.