The 9 Most Convincing Alien Abductions In Modern History

Published March 15, 2026

The Alien Abduction Of Antônio Villas Boas That Ended In Extraterrestrial Coitus

Antonio Villas Boas Being Examined

YouTubeAntônio Villas Boas being examined by Dr. Fontes.

In 1954, two Venezuelan teenagers claimed that they found a UFO in the woods and were only able to escape with their lives after fighting off small, hairy aliens. Brazilian journalist João Martins covered the alleged experience in 1957, and asked readers to send in their own. That’s when he was contacted by farmer Antonio Villas Boas.

Martins paid for the 23-year-old’s travel expenses and put him up in Rio de Janeiro where Dr. Olavo Fontes examined him. Boas claimed that he experienced an alien abduction one day after reading Martins’ article chronicling the Venezuela incident — which seemed rather convenient.

Boas said he had been working nights in his family’s field in order to avoid the hot daytime temperatures. On Oct. 16, 1957, he purportedly saw a “red star” above the fields near São Francisco de Sales. As it approached, Boas claimed that atop the egg-shaped craft was a cupola containing a rotating red light.

As the vessel extended its three legs to the earth, Boas claimed that he tried to flee, but was captured by five-foot-tall beings wearing grey overalls and helmets and then taken aboard their ship. Boas alleged that the beings’ eyes were blue and small and their communication consisted of animal-like sounds.

Antonio Villas

YouTubeAntônio Villas Boas stuck to his alien story until he died in 1991.

After blood was taken from his chin, Boas was purportedly placed into a room filled with a strange gas which caused him to feel severely ill. Soon, a female entered the room, and Boas claimed that the two of them engaged in intercourse.

Afterwards, the woman gestured to her stomach then motioned upwards, which Boas later interpreted to mean that she would raise their child in space. Boas claimed he felt angry at having been treated like a “good stallion” by the beings. He was subsequently taken off the ship and watched it ascend to the heavens. Four hours had passed since his abduction.

Though both Martins and Dr. Fontes believed the story was fabricated, the doctor noticed signs that Boa had radiation sickness such as nausea and bruising, burning sensations in the eye, and skin that was painful to the touch.

Boas later became a successful lawyer who created models of the UFO from his story in his spare time. While Walter Buhler of the Brazilian ufology group SBEDV visited him in 1962 and published a report on his story, it still remains unproven. Boas died in in 1991, but his intriguing alien story lives on.

The UFO Abduction Of Pilot Frederick Valentich While He Was Mid-Flight

Young Frederick Valentich With His Airplane

The Herald SunFrederick Valentich with his plane shortly before his 1978 disappearance.

On Oct. 21, 1978, Australian pilot Frederick Valentich disappeared into thin air. It was during a 125-nautical-mile training flight aboard his Cessna 182L, over the Bass Strait between Tasmania and the Australian mainland, that the confounding incident occurred.

It’s important to note that the 20-year-old, who was an enthusiast of alien stories and ufology, was a fairly experienced pilot. At 7:06 p.m. while at 4,500 feet, after departing Moorabbin to reach King Island, Valentich reported that an unidentified craft was following him.

Melbourne Flight Service insisted that there was no traffic near him, but the pilot was adamant a large vessel was on his tail. He explained that it had four bright lights, and suddenly passed 1,000 feet above him at remarkable speed.

For five straight minutes Valentich described its movements and shiny, metallic exterior. Suddenly, Valentich experienced engine trouble. Melbourne Flight Service asked him once again what the aircraft looked like.

“It is hovering and it’s not an aircraft,” were his final words.

Headline About Frederick Valentich Alien Encounter

The AustralianThe Oct. 23, 1978, headline of The Australian details Frederick Valentich’s UFO incident.

The last sound radio officials heard was a “metallic, scraping sound.” Authorities presumed he had crashed, but a later search of the area yielded nothing. Not even the Australian Department of Transport could find answers. In 2014, however, new claims came to light.

A UFO Action group in Victoria alleged that an unidentified farmer observed a UFO nearly 90 feet in length, hovering above his farm on the morning following Valentich’s disappearance. More importantly, the farmer purportedly claimed that the pilot’s plane was stuck to the UFO, leaking oil.

While the farmer said he scratched the airplane’s registration number on his tractor, he never came forward, claiming that the ridicule he’d received from his peers after telling them his tale had discouraged him. Unfortunately, the Victorian UFO group never managed to identify the man. For the UFO Action group’s lead investigator George Simpson, frustration abounds.

“It’s easy for some to dismiss, but there are corroborating stories confirming there was a UFO near Adelaide at the time,” he said. “This was an experienced pilot who should have been able to identify another aircraft but was clearly unable to.”

Ultimately, only a few possibilities regarding the disappearance of Frederick Valentich exist: that he crashed and his remains were never recovered, that he purposefully disappeared, or of course, that he was abducted by entities we don’t yet understand.

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Marco Margaritoff
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A former staff writer for All That’s Interesting, Marco Margaritoff holds dual Bachelor's degrees from Pace University and a Master's in journalism from New York University. He has published work at People, VICE, Complex, and serves as a staff reporter at HuffPost.
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John Kuroski
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Based in Brooklyn, New York, John Kuroski is the editorial director of All That's Interesting. He graduated from New York University with a degree in history, earning a place in the Phi Alpha Theta honor society for history students. An editor at All That's Interesting since 2015, his areas of expertise include modern American history and the ancient Near East. In an editing career spanning 17 years, he previously served as managing editor of Elmore Magazine in New York City for seven years.
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Margaritoff, Marco. "The 9 Most Convincing Alien Abductions In Modern History." AllThatsInteresting.com, March 15, 2026, https://allthatsinteresting.com/alien-abductions. Accessed April 2, 2026.