04/01/2011 02:12 pm ET | Updated Jun 01, 2011

April Fool's Day: World's Greatest Hoaxes (PHOTOS)

Though many of them seem absurd in retrospect, colossal hoaxes have been making fools of people around the world for centuries.

From alien encounters to foreign invasions, some of these hoaxes were even examined by scientific experts and reported by some of the world's most respected publications before being disproved.

In honor of April Fool's Day, the Huffington Post World team has brought together some of the world's most deceptive hoaxes in recent history. Take a look at our choices below, and let us know which ones we've forgotten:

World's Best Hoaxes