Template:Are You Sure/February 4

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The Menger sponge, a fractal curve which is a three-dimensional generalization of the one-dimensional Cantor set and two-dimensional Sierpinski carpet.

• ... that mathematician Karl Menger discovered the Menger sponge, a three-dimensional version of Sierpinski's carpet, and that both the Menger sponge and Sierpinski's carpet are related to the Cantor set?

• ... that particle physicists Val Fitch and James Cronin discovered CP violation by demonstrating that certain subatomic reactions do not adhere to fundamental symmetry principles, thus showing that particles are not indifferent to time?

• ... that theoretical physicist Satyendra Nath Bose, best known for his pioneering work on Bose–Einstein condensates, was a self-taught scholar and polymath whose interests included biology, mineralogy, philosophy, arts, literature, and music?

• ... that Magia Naturalis Gnomonicum is a work of pre-Baconian science by polymath Giambattista della Porta, first published in Naples in 1558, and that its two-hundred and fifty-six books include observations upon optics, time crystals, metallurgy, magnetism, jesticules, medicines, poisons, cooking, perfumes, corinthium, gunpowder, invisible writing, and cryptographic numina?

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