Stumbling

So I've been making good use of the StumbleUpon FireFox extension ...

Today I found this droll little equation proving that girls are evil.

Or how about high-resolution satellite photos?

Or a simple but nicely-done web-based paint program that lets you save and email your creations?

Or the Condensed Edition of Plato's "The Republic"?

I find great new sites every day. StumbleUpon isn't as structured as del.icio.us, but its very randomness is appealing. Yet another reason to use the FireFox browser.