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NOVA: Hunting the Hidden Dimension

Fractals—jagged geometric shapes made up of parts that resemble the whole—are all around us, from mountain ranges to blood vessels. Yet it wasn’t until the 1970s that maverick mathematician Benoit Mandelbrot discovered and described them, allowing us to solve problems of calculation—such as measuring coastlines—that were previously impossible. A lively edition of NOVA explores the ever-widening applications of fractal geometry, from designing fashion to detecting cancer. Tuesday, Oct. 28, at 8 p.m., PBS; check local listings

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