In 1998, a newsletter titled New Mexicans for Science and Reason carried an article that the state of Alabama had voted to change the value of pi from 3.14159 to the "Biblical value" of 3.0。
1998年愚人节，新墨西哥人科学与推理组织的通讯上刊登的一篇文章中称，美国阿拉巴马州已投票决定，将圆周率值3.14159改为"圣经值"3.0。
Burger King, an American fast-food chain, published a full-page advertisement in USA Today in 1998 announcing the introduction of the "Left-Handed Whopper," specially designed for the 32 million left-handed Americans. According to the advertisement, the new burger included the same ingredients as the original, but the condiments were rotated 180 degrees. The chain said it received thousands of requests for the new burger, as well as orders for the original "right-handed" version。
1998年愚人节当天，美国汉堡王快餐连锁店在《今日美国》上发布了一则长达一页的广告，介绍一款专为美国3200万个“左撇子”设计的“左撇子汉堡”。该广告中称，新汉堡的配料和普通汉堡没什么区别，但其中所夹的调味品都被旋转了180度放置。连锁店称，广告登出后，他们接到数千份订单，还收到了很多老式("右撇子")汉堡的订单。
Discover Magazine announced in 1995 that a highly respected biologist, Aprile Pazzo (Italian for April Fool)， had discovered a new species in Antarctica: the hotheaded naked ice borer. The creatures were described as having bony plates on their heads that became burning hot, allowing the animals to bore through ice at high speed。
1995年愚人节，《发现》杂志公布，一位德高望重的、名叫Aprile Pazzo(意大利语：愚人节)的生物学家在南极洲发现了一种名叫热裸体钻冰虫的新物种。据介绍，这种生物头部的骨头能变得滚烫，所以可以高速的钻冰。
Noted British astronomer Patrick Moore announced on the radio in 1976 that at 9:47 am, a once-in-a-lifetime astronomical event, in which Pluto would pass behind Jupiter, would cause a gravitational alignment that would reduce the Earth's gravity. Moore told listeners that if they jumped in the air at the exact moment of the planetary alignment, they would experience a floating sensation. Hundreds of people called in to report feeling the sensation。
1976年愚人节，英国著名天文学家帕特里克·摩尔通过电台宣布，当天早上9时47分会出现一个百年一遇的天文现象，冥王星将从木星后面经过，由此而形成的引力组合将使地球的引力减弱。摩尔告诉听众，如果他们在经过的那一时刻跳起来，会有一种飘浮感。当时，数百人打电话去电台，称他们确实感到了那种“飘浮感”。