April Fool's Day is a holiday where people play pranks on each other all across the world, and has been celebrated since the olden times. While you might be switching the salt and the sugar, or putting a plastic spider in someone's tea, there have been some truly incredible pranks that fooled the entire world.

The Swiss Spaghetti Harvest, 1957: On April 1, 1957 the British news show Panorama broadcast a three-minute segment about a bumper spaghetti harvest in southern Switzerland. The success of the crop was attributed both to an unusually mild winter and to the "virtual disappearance of the spaghetti weevil." The audience heard Richard Dimbleby, the show's highly respected anchor, discussing the details of the spaghetti crop as they watched video footage of a Swiss family pulling pasta off spaghetti trees and placing it into baskets. The segment concluded with the assurance that, "For those who love this dish, there's nothing like real, home-grown spaghetti." The Swiss Spaghetti Harvest hoax generated an enormous response. Hundreds of people phoned the BBC wanting to know how they could grow their own spaghetti tree. To this query the BBC diplomatically replied, "Place a sprig of spaghetti in a tin of tomato sauce and hope for the best." To this day the Panorama broadcast remains one of the most famous and popular April Fool's Day hoaxes of all time. It is also believed to be the first time the medium of television was used to stage an April Fool's day hoax.

San Serriffe: In 1977 the Guardian published a seven-page "special report" about San Serriffe, a small country located in the Indian Ocean consisting of several islands that make the shape of a semi-colon. The two main islands were called Upper Caisse and Lower Caisse. They did an in-depth series of articles on the history, geography and daily life on these idyllic islands. The Guardian's phones rang all day as readers wanted more information about the perfect-sounding fictional holiday spot, and the hoax began a tradition in newspapers to try and fool their readers.

The Left-Handed Whopper: Burger King, a chain of fast-food restaurants, published a full page advertisement in the April 1st edition of USA Today announcing the introduction of a new item to their menu: a "Left-Handed Whopper" specially designed for the 32 million left-handed Americans. According to the advertisement, the new whopper included the same ingredients as the original Whopper (lettuce, tomato, hamburger patty, etc.), but all the condiments were rotated 180 degrees for the benefit of their left-handed customers. The following day Burger King issued a follow-up release revealing that although the Left-Handed Whopper was a hoax, thousands of customers had gone into restaurants to request the new sandwich. Simultaneously, according to the press release, "many others requested their own 'right handed' version."

Flying Penguins: On 1 April 2008, the BBC announced that camera crews filming near the Antarctic for its natural history series Miracles of Evolution had captured footage of Adélie penguins taking to the air. It even offered a video clip of these flying penguins, which became one of the most viewed videos on the internet. Presenter Terry Jones explained that, instead of huddling together to endure the Antarctic winter, these penguins took to the air and flew thousands of miles to the rainforests of South America where they "spend the winter basking in the tropical sun." A follow-up video explained how the BBC created the special effects of the flying penguins.

On 1 April 1972, newspaper headlines around the world announced the dead body of the Loch Ness Monster had been found. A team of zoologists from Yorkshire's Flamingo Park Zoo, who were at Loch Ness searching for proof of Nessie's existence, had discovered the carcass floating in the water the day before. Initial reports claimed it weighed a ton and a half and was 15½ feet long. Upon inspection, Nessie turned out to be a bull elephant seal. The zoo's education officer, John Shields, confessed he had been responsible for placing the body in the Loch. The seal had died the week before, and he had shaved off its whiskers, padded its cheeks with stones, and kept it frozen for a week, before dumping it in the Loch. The seal's body was displayed at the Flamingo Park Zoo for a few days before being properly disposed of.

The Case of the Interfering Brassieres: The 1 April 1982 issue of the Daily Mail reported that a local manufacturer had sold 10,000 "rogue bras" that were causing a unique and unprecedented problem, not to the wearers but to the public at large. Apparently the support wire in these bras had been made out of a kind of copper originally designed for use in fire alarms. When this copper came into contact with nylon and body heat, it produced static electricity which, in turn, was interfering with local television and radio broadcasts. The chief engineer of British Telecom, upon reading the article, immediately ordered that all his female laboratory employees disclose what type of bra they were wearing.

Man Flies By Own Lung Power: In April 1934, many American newspapers (including The New York Times) printed a photograph of a man flying through the air by means of a device powered only by the breath from his lungs. Accompanying articles excitedly described this miraculous new invention. The man, identified as German pilot Erich Kocher, blew into a box on his chest. This activated rotors that created a powerful suction effect, lifting him aloft. Skis on his feet served as landing gear, and a tail fin allowed him to steer. What the American papers didn't realize was that the "lung-power motor" was a joke. The photo had first appeared in the April Fool's Day edition of the Berliner Illustrirte Zeitung. It made its way to America thanks to Hearst's International News Photo agency which not only fell for the hoax but also distributed it to all its U.S. subscribers. In the original article, the pilot's name was spelled "Erich Koycher," which was a pun on the German word "keuchen," meaning to puff or wheeze.

Bombs Away! 1915: On April 1, 1915, in the midst of World War I, a French aviator flew over a German camp and dropped what appeared to be a huge bomb. The German soldiers immediately scattered in all directions, but no explosion followed. After some time, the soldiers crept back and gingerly approached the bomb. They discovered it was actually a large football with a note tied to it that read, "April Fool!"

The Origin of April Fool’s Day: In 1983 the Associated Press reported that the mystery of the origin of April Fool's Day had finally been solved. Joseph Boskin, a History professor at Boston University, had discovered that the celebration had begun during the Roman empire when a court jester had boasted to Emperor Constantine that the fools and jesters of the court could rule the kingdom better than the Emperor could. In response, Constantine had decreed that the court fools would be given a chance to prove this boast, and he set aside one day of the year upon which a fool would rule the kingdom. The first year Constantine appointed a jester named Kugel as ruler, and Kugel immediately decreed that only the absurd would be allowed in the kingdom on that day. Therefore the tradition of April Fools was born. News media throughout the country reprinted the Associated Press story. But what the AP reporter who had interviewed Professor Boskin for the story hadn't realized was that Boskin was lying. Not a word of the story was true, which Boskin admitted a few weeks later. Boston University issued a statement apologizing for the joke, and many papers published corrections.

World to End Tomorrow: On March 31, 1940 the Franklin Institute issued a press release stating that the world would end the next day. The release was picked up by radio station KYW which broadcast the following message: "Your worst fears that the world will end are confirmed by astronomers of Franklin Institute, Philadelphia. Scientists predict that the world will end at 3 P.M. Eastern Standard Time tomorrow. This is no April Fool joke. Confirmation can be obtained from Wagner Schlesinger, director of the Fels Planetarium of this city." The public reaction was immediate. Local authorities were flooded with frantic phone calls. The panic only subsided after the Franklin Institute assured people that it had made no such prediction. The prankster responsible for the press release turned out to be William Castellini, the Institute's press agent. He had intended to use the fake release to publicize an April 1st lecture at the institute titled "How Will the World End?" Soon afterwards, the Institute dismissed Castellini.