The above is a tiny portion of a high-resolution plot which shows the density of roots of certain degree 24 polynomials. A variety of wonderful patterns emerge.

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A ferrofluid is a liquid which becomes strongly magnetized in the presence of a magnetic field.

Notice how the peaks in the fluid are aligned with the underlying magnetic field lines.

Apart from just being damn cool, ferrofluids are used in low friction seals for rotating shaft motors and computer disk drive seals.

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