Bubble Chamber. A really cool simulation of what goes on in a bubble chamber. You can even make it into some nifty wallpaper!
*Forgive me for posting such a brief link as my first entry for the science blogger challenge. I know. Lame. If you've noticed the timestamp, I just got out of TAing a class for most of the day. And I feel totally drained. (Before you get suspicious, it's a lab class. With lots of sections.) I'll have better stuff tomorrow, I promise.
