Your Favorite Things to do with Wolfram Alpha?

[IContainMultitudes]

What are some of your favorite things to do with Wolfram Alpha? I've known about it for a while and played around with it a bit, but I've mainly just used it for fairly simple things like calculating distance between places and things like that. What are some other things I should try?

Wolfram|Alpha: Computational Knowledge Engine

 

[WildCat]

Never heard of this, I've heard of and played around with Cleverbot but that's a different concept. I've tried Moore's law - apparently you get a graph, an option for the year, and transistor count. Nifty I'd say.