Hilbert curves are pretty cool. The animation illustrates the fractal quality of successive generations of Hilbert curves.

» Permalink## Math

## Galileo and Wagon Wheels

Galileo...noted the curve now known as the cycloid, traced out by a point on the rim of a wheel as it rolls along a horizontal path... [H]e abandoned study of the curve, suggesting only that the cycloid would make an attractive arch for a bridge... Carl B. Boyer,

*A History of Mathematics*. Wiley & Sons, 1989. p. 327