DeepMind's AI can control superheated plasma inside a fusion reactor

In nuclear fusion, the atomic nuclei of hydrogen atoms get forced together to form heavier atoms, like helium. This produces a lot of energy relative to a tiny amount of fuel, making it a very efficient source of power. It is far cleaner and safer than fossil fuels or conventional nuclear power, which is created by fission--forcing nuclei apart. It is also the process that powers stars. Controlling nuclear fusion on Earth is hard, however.