For many noncontroversial, unambiguous queries(1), Google already directly answers the search query. For ambiguous or controversial queries, you're gonna want

For many noncontroversial, unambiguous queries(1), Google already directly answers the search query. For ambiguous or controversial queries, you're gonna want the references and context of the original source. (1) http://www.google.co.uk/search?hl=en&safe=off&client=firefox-a&rls=org.mozilla%3Aen-GB%3Aofficial&hs=aPO&q=pi+meters+per+half+fortnight+in+yards+per+euler%27s+constant+lunar+months&btnG=Search&meta= http://www.google.co.uk/search?hl=en&safe=off&client...