Oogling Google

I'm sure we all know about "google":http://www.google.com/ since, well, we all have to find stuff sometimes. But do we all know about these funky hidden google features?

If "this":http://www.google.com/search?q=speed+of+light+in+cubits+per+fortnight&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8 isn't just the wackiest thing i've ever seen on google, i don't know "what is":http://www.google.com/help/features.html (though i'm sure someone will show me...)

Comments !