may struggle to grasp the true appearance of a four-dimensional cube or ‘tesseract’, though, as we’ll see, we can try to represent it in two or three dimensions. But it’s straightforward to describe the progression from square to cube to tesseract: a square has 4 vertices (corners) and 4 edges; a cube has 8 vertices, 12 edges, and 6 faces; a tesseract has 16 vertices, 32