08/12/2026
Most 12-year-olds are thinking about school, games, and hanging out with friends.
Jackson Oswalt was thinking about nuclear fusion.
The Tennessee teenager became obsessed with the idea and started building a fusion device in his familyâs playroom.
Then, just before turning 13, he achieved nuclear fusion.
He went on to become the youngest known person to accomplish it.
Not bad for a kid working out of his playroom.