The 10 Best April Fool’s Day Hoaxes of All Time

During an interview on BBC Radio 2, on the morning of April 1, 1976, the British astronomer Patrick Moore announced that an extraordinary astronomical event was about to occur. At exactly 9:47 am, the planet Pluto would pass directly behind Jupiter, in relation to the Earth. This rare alignment would mean that the combined gravitational force of the two planets would exert a stronger tidal pull, temporarily counteracting the Earth's own gravity and making people weigh less. Moore called this the Jovian-Plutonian Gravitational Effect. Moore told listeners that they could experience the phenomenon by jumping in the air at the precise moment the alignment occurred. If they did so, he promised, they would experience a strange floating sensation. At 9:47, Moore declared, "Jump now!" A minute passed, and then the BBC switchboard lit up with dozens of people calling in to report that the experiment had worked! A Dutch woman from Utrecht said that she and her husband had floated around the room together. Another caller claimed she had been seated around a table with eleven friends and that all of them, including the table, had begun to ascend. But not everyone was happy. One angry caller complained he had risen from the ground so rapidly that he hit his head on the ceiling, and he wanted compensation. Moore's announcement was, of course, an April Fool's Day joke. It became one of the most celebrated April Fool's Day hoaxes of the late 20th century. However, it wasn't just a random joke. Moore intended it as a spoof of a pseudoscientific astronomical theory that had recently been promoted in a book by John Gribbin and Stephen Plagemann called The Jupiter Effect.

The April 1995 issue of Discover Magazine reported that the highly respected wildlife biologist Dr. Aprile Pazzo had found a new species in Antarctica: the hotheaded naked ice borer. These fascinating creatures had bony plates on their heads that, fed by numerous blood vessels, could become burning hot, allowing the animals to bore through ice at high speeds. They used this ability to hunt penguins, melting the ice beneath the penguins and causing them to sink downwards into the resulting slush where the hotheads consumed them. After much research, Dr. Pazzo theorized that the hotheads might have been responsible for the mysterious disappearance of noted Antarctic explorer Philippe Poisson in 1837. "To the ice borers, he would have looked like a penguin," the article quoted her as saying. Discover received more mail in response to this article than they had received for any other article in their history.

Burger King 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."

The April 1998 issue of the New Mexicans for Science and Reason newsletter contained an article claiming that the Alabama state legislature had voted to change the value of the mathematical constant pi from 3.14159 to the 'Biblical value' of 3.0. Soon the article made its way onto the internet, and then it rapidly spread around the world, forwarded by email. It only became apparent how far the article had spread when the Alabama legislature began receiving hundreds of calls from people protesting the legislation. The original article, which was intended as a parody of legislative attempts to circumscribe the teaching of evolution, was written by physicist Mark Boslough.

The 1 April 1992 broadcast of National Public Radio's Talk of the Nation revealed that Richard Nixon, in a surprise move, was running for President again. His new campaign slogan was, "I didn't do anything wrong, and I won't do it again." Accompanying this announcement were audio clips of Nixon delivering his candidacy speech. Listeners responded viscerally to the announcement, flooding the show with calls expressing shock and outrage. Only during the second half of the show did the host John Hockenberry reveal that the announcement was a practical joke. Nixon's voice was impersonated by comedian Rich Little.

On April 1, 1977 the British newspaper The Guardian published a seven-page "special report" about San Serriffe, a small republic located in the Indian Ocean consisting of several semi-colon-shaped islands. A series of articles described the geography and culture of this obscure nation. The report generated a huge response. The Guardian's phones rang all day as readers sought more information about the idyllic holiday spot. However, San Serriffe did not actually exist. The report was an elaborate April Fool's Day joke — one with a typographical twist, since numerous details about the island (such as its name) alluded to printer's terminology. The success of this hoax is widely credited with inspiring the British media's enthusiasm for April Foolery in subsequent years.

On April 1, 1996 a full page ad appeared in six major American newspapers (The Philadelphia Inquirer, New York Times, Washington Post, Chicago Tribune, Dallas Morning News, and USA Today) announcing that the fast food chain Taco Bell had purchased the Liberty Bell.

The full text of the ad read: Taco Bell Buys The Liberty Bell In an effort to help the national debt, Taco Bell is pleased to announce that we have agreed to purchase the Liberty Bell, one of our country's most historic treasures. It will now be called the "Taco Liberty Bell" and will still be accessible to the American public for viewing. While some may find this controversial, we hope our move will prompt other corporations to take similar action to do their part to reduce the country's debt.

In a separate press release, Taco Bell explained that the Liberty Bell would divide its time between Philadelphia and the Taco Bell headquarters in Irvine. It compared the purchase to the adoption of highways by corporations. Taco Bell argued that it was simply "going one step further by purchasing one of the country's greatest historic treasures." The company boasted, "Taco Bell's heritage and imagery have revolved around the symbolism of the bell. Now we've got the crown jewel of bells."

Sweden's most famous April Fool's Day hoax occurred on April 1, 1962. At the time, SVT (Sveriges Television) was the only television channel in Sweden, and it broadcast in black and white. The station announced that their "technical expert," Kjell Stensson, was going to describe a process that would allow people to view color images on their existing black-and-white sets. The broadcast cut to Stensson sitting in front of a television set in the studio. He began to explain how the process worked. His discussion was highly technical, going into details about the prismatic nature of light and the phenomenon of "double slit interference." But at last he arrived at the main point. Researchers, he said, had recently discovered that a fine-meshed screen placed in front of a black-and-white television screen would cause the light to bend in such a way that it would appear as if the image was in color. Stensson told viewers they could experience the effect at home with the help of some simple, readily accessible materials. Nylon stockings, it turned out, were the perfect fabric to use as a fine-meshed screen. So all viewers had to do, Stensson said, was to cut open a pair of stockings and tape them over the screen of their television set. The image on the television should suddenly appear to be in color. Stensson cautioned that the viewer would have to be seated at the correct distance from the screen in order to get the full effect. Also, it might be necessary to "move your head very carefully" back and forth, in order to align the color spectrum. Thousands of viewers later admitted they had fallen for the hoax. Many Swedes today report that they remember their parents (their fathers in particular) rushing through the house trying to find nylon stockings to place over the TV set. SVT attempted its first color broadcast four years later, in 1966. Regular color broadcasts were begun in Sweden on April 1, 1970.

In its April 1985 edition, Sports Illustrated published an article by George Plimpton that described an incredible rookie baseball player who was training at the Mets camp in St. Petersburg, Florida. The player was named Sidd Finch (Sidd being short for Siddhartha, the Indian mystic in Hermann Hesse's book of the same name). He could reportedly pitch a baseball at 168 mph with pinpoint accuracy. The fastest previous recorded speed for a pitch was 103 mph. Finch had never played baseball before. He had been raised in an English orphanage before he was adopted by the archaeologist Francis Whyte-Finch who was later killed in an airplane crash in the Dhaulaglri mountain region of Nepal. Finch briefly attended Harvard before he headed to Tibet where he learned the teachings of the "great poet-saint Lama Milaraspa" and mastered "siddhi, namely the yogic mastery of mind-body." Through his Tibetan mind-body mastery, Finch had "learned the art of the pitch." Finch showed up at the Mets camp in Florida, and so impressed their manager that he was invited to attend training camp. When pitching he looked, in the words of the catcher, "like a pretzel gone loony." Finch frequently wore a hiking boot on his right foot while pitching, his other foot being bare. His speed and power were so great that the catcher would only hear a small sound, "a little pft, pft-boom," before the ball would land in his glove, knocking him two or three feet back. One of the players declared that it was not "humanly possible" to hit Finch's pitches. Unfortunately for the Mets, Finch had not yet decided whether to commit himself to a career as a baseball player, or to pursue a career as a French Horn player. He told the Mets management that he would let them know his decision on April 1.

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.