Squares on a grid

Over on Yahoo!Answers someone asked how many squares could be drawn on a 8 by 8 grid. I didn't have a clue so I wrote a program to generate them all and count as it went. The answer turned out to be 540. The image of all those squares is quite nice so I thought I would share it here:

Polyhedron from the inside.

Several people liked the swimming tadpoles, so here is another animated graphic. This one I created. It it is based on the snub dodecahedron. A stellated version of the entire polyhedron was projected from the center to a rectangle (like a Mercator projection of the earth), while the object rotated. Here it is: