This cutting-edge nuclear fusion plant is simultaneously the hottest and coldest place in the solar system

In an unassuming industrial park 30 miles outside Boston, engineers are building a futuristic machine to replicate the energy that powers the stars. If all goes to plan, it could be the key to producing virtually unlimited, clean electricity in the United States in about a decade.

​ In an unassuming industrial park 30 miles outside Boston, engineers are building a futuristic machine to replicate the energy that powers the stars. If all goes to plan, it could be the key to producing virtually unlimited, clean electricity in the United States in about a decade. Read More Breaking News, Latest News and Videos | CNN