Penn State in 1955 became the first university to be issued a federal license to operate a nuclear reactor, which it continues to use for studies in the peaceful uses of atomic energy and the training of nuclear industry personnel. ↗
Our present nuclear fusion reactors are classified by the methods used to support the nuclear fusion reaction, which takes place at a temperature much hotter than the surface of the Sun. ↗
Apollo 13, as you may remember, gave us a reactor that is bubbling away right now somewhere in the Pacific. It's supposed to be bubbling away on the moon, but it's in the Pacific Ocean instead. ↗