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Marcus du Sautoy's Five Shapes Episodes

  1.

    The Blob

    From globular cartoon characters to curvy cars, the blob has always been around.

  2. The Bagel

    The bagel is not just a good shape for baking. It's also good for office complexes.

  3. The Sphere

    The sphere's perfect form is the most economical shape for containing matter.

  4. The Pyramid

    The Pyramid: a classic shape to bury Pharoahs and an influence on modern designers.

  5. The Cube

    Why isn't the cube form used more often? And what does it look like in four dimensions?