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Erica Klarich
Science and math writer and longtime Quanta contributor who reports on mathematical discoveries, here explaining the Noperthedron counterexample to the Rupert tunnel conjecture.
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Jan 13, 2026
• 27min
The Shape That Can’t Pass Through Itself
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Erica Klarich, a science and math writer and longtime Quanta contributor, dives into the intriguing world of geometry. She discusses the Noperthedron, a groundbreaking discovery that challenges the Rupert tunnel conjecture, revealing a shape that cannot pass through itself. Klarich explains the historical context behind the puzzle, the complex characteristics of the Noperthedron, and the creative use of computer searches in its discovery. She also touches on the implications for geometry and recommends Jane Austen's Emma as a literary delight.
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