Wolfram|Alpha

Wolfram|Alpha, billed as the "Computational Knowledge Engine", is a search engine of sorts that, well, they say it better:

fundamentally new way to get knowledge and answers — not by searching the web, but by doing dynamic computations based on a vast collection of built-in data, algorithms, and methods.

It's actually a brilliant tool that at this stage is pretty fun to mess around with and provides some interesting results for special queries.

More information about them, from the website:

We aim to collect and curate all objective data; implement every known model, method, and algorithm; and make it possible to compute whatever can be computed about anything. Our goal is to build on the achievements of science and other systematizations of knowledge to provide a single source that can be relied on by everyone for definitive answers to factual queries.

If you have never tried this out, please do yourself a favor and visit. We can almost guarantee that you will be pleasantly surprised.

Visit Wolfram|Alpha