Lifeboat Foundation

A Tennessee teen has become the youngest person in America—and possibly the world—to build a working nuclear reactor and achieve fusion.

Jackson Oswalt, now 14, set out on the ambitious project when he was just 12, according to USA Today, and achieved nuclear fusion in his Memphis home just hours before he turned 13 on Jan. 19, 2018.

“A couple of years back, all I did was play video games,” he told the news outlet. “And I decided I didn’t want to spend all my life doing video games.”