What is it about April Fools' Day jokes that we love so much? Perhaps it's that, in the midst of the crushing influx of information that many of us cope with daily, a well-constructed prank provides a welcome break. For a moment, we smile, even when the joke is a tried-and-true chestnut.

Google has a strong tradition of sublime hilarity each April 1. Last year, the company announced two faux products designed to elicit a chuckle from unsuspecting (and suspecting) readers: Gmail Paper (6GB of messages, rendered as hard copy) and Google TiSP, a plumbing-based Internet Service Provider dedicated to harnessing the underutilized potential of the nation's "dark porcelain." (See PC World Senior Writer Tom Spring's complete slideshow for a retrospective of Google's April Fool's and other fun inventions over the years.)

In recent times, many other sites have pulled our collective leg with April Fools pages marked by realistic graphics and ridiculous but deadpan copy. Here are ten of our favorites. Just click the linked header for each entry to see the prank (or its fallout) come to life.

10. Facebook Funnies

Last year, Facebook users noticed some unusual entries scattered among News Feed updates, including the announcement of a new LivePoke feature, in which invited users to dispatch a real live person to physically poke their Facebook friends (offer limited to first 100 members of a network). Another entry reported that Harry (Potter, not PC World's editor in chief McCracken) and Voldemort (more of a MySpace kind of guy anyway) had returned to their former relationship status as mortal enemies. Good work, guys, and better luck next year on moving up our list.

9. Dead Fairy on eBay

In late March 2007, Dan Baines posted a Web page describing (and illustrating with detailed photos) the discovery of what appeared to be the remains of a "real" fairy. Baines claimed that the mummified fairy corpse was recovered along an old Roman road in Derbyshire, England, by a dog-walker who preferred to remain anonymous. The bones of its diminutive, human-like skeleton were hollow, like a bird's, making it "particularly light," an anatomical peculiarity whose contribution to airworthiness was enhanced by the body's extremely leaflike--uh, lifelike--wings.

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