Go to google and search for "answer to life the universe and everything".
It really is 42!
Other google easter eggs:
Quote: "April Fool's Day jokes
Main article: Google's hoaxes
Google has a tradition of creating April Fool's Day jokes - such as , which allegedly featured the use of mental power to search the web. In 2002, they claimed that pigeons were the behind their growing search engine. In 2004, they featured (which claimed to feature jobs on the moon) and in 2005, a fictitious brain-boosting drink, termed was announced. In 2006 they came up with Google Romance.
One can find other pranks hidden in amongst Google's pages; for instance, in the languages list one can find a Bork! Bork! Bork! version of the site (imitating the Muppet Show's Swedish Chef), and they also offer versions in Pig Latin, "Elmer Fudd", Hacker ("H4X0R"), and Klingon. Another prank is Google's answer to life, the universe, and everything.
Some thought the announcement of Gmail in 2004 around April Fool's Day (as well as the doubling of Gmail's storage space to two gigabytes in 2005) was a joke, though it turned out (in both cases) to be a genuine announcement. In 2005 a comedic graph depicting Google's goal of "infinity plus one" GB of storage was featured on the Gmail homepage."
From http://encyclopedia.thefreedictionary.com/Google+(Company).