On my windowsill, I bent a piece of rubber into a sine curve. Or a cosine curve. I guess I should have included some axes.
Appreciation Technology
Bubbles in Space
Jorn Barger links to the best stuff: a zero-gravity (micro-gravity?) experiment involving a spherical water droplet and an Alka Seltzer tablet.
Appreciation Challenge Geometry
Are You An Optimist?
Is this cone (approximately) half-empty, or (approximately) half-full?
