What the FBI said when they knocked on the door of 12-year-old who achieved nuclear fusion in his room
Published on Oct 28, 2025 at 9:08 AM (UTC-4)
by Daisy Edwards
Last updated on Oct 28, 2025 at 9:09 AM (UTC-4)
Edited by
Kate Bain

Jackson Oswalt, a 12-year-old from Memphis, built a working nuclear fusion reactor inside his bedroom using parts he found online.
He spent over a year testing, rewiring, and perfecting the machine until it finally fused atoms together.
Then one morning, FBI agents arrived at his house with radiation scanners.
After discovering what he had been working on in his bedroom, the FBI had some words for the youngster.
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How this 12-year-old achieved nuclear fusion in his room
Jackson Oswalt started experimenting with nuclear physics after getting curious about how the universe worked.
He watched countless science videos and read everything he could about atomic energy before deciding to try fusion for himself.
With parts sourced online, Jackson built a vacuum chamber and a fusor that could create plasma.
After months of testing and adjusting, he reached nuclear fusion at just 12 years old, which the Guinness World Records confirmed as a world record.
He’s the youngest person in the world to accomplish the reaction that powers the sun, all from a bedroom setup in Tennessee.


What was the FBI’s reaction?
When FBI agents showed up at his house carrying radiation detectors, they were shocked to say the least.
They checked the room for any signs of leaks or contamination and confirmed the project was safe, with Jackson later joking that ‘fortunately, I remained a free man’.
The agents reportedly told the family there were no violations and that the experiment, while surprising, was under control.

The visit made his record even more legendary, proof that his homemade reactor was powerful enough to get the government’s attention without breaking any laws.
Jackson’s story continues to inspire a generation of young scientists and shows us that scientific discoveries can happen even in the most unexpected places.
What is nuclear fusion?
Nuclear fusion is the process where two light atomic nuclei combine to form a heavier nucleus, releasing a huge amount of energy in the process.
It’s the same reaction that powers the Sun and other stars.
It doesn’t produce greenhouse gases or radioactive waste like current nuclear plants do.
And it’s exciting because it could provide nearly limitless clean energy.
Daisy is a technology and automotive journalist covering artificial intelligence, consumer tech, Apple news, cryptocurrency, emerging technologies, and transportation innovation. Since joining the team in 2025, she has reported on everything from AI-powered startups and major iOS updates to viral car stories and the latest developments shaping transportation and the digital economy. Drawing on her background in automotive journalism and a degree in History and Journalism from Goldsmiths, University of London, Daisy specializes in breaking down complex topics into clear, engaging reporting for a global audience. Her work spans cutting-edge technology, innovative vehicles, and the people driving change across both industries. Daisy has gained first-hand access to some of the world's most talked-about technologies and innovators, including meeting Tesla's Optimus humanoid robot during its first European appearance in London. She has also discussed the future of space exploration with an astronaut, bringing unique insights and real-world perspectives to her coverage of emerging technology.