China created a 70,000,000ºC "artificial sun". This is five times hotter than the sun. It was hot for over 17 minutes. This is a record. Scientists reproduced nuclear fusion. This is what happens inside our sun. They are trying to make lots of clean energy. The heat project has cost more than $950 billion.

Scientists have worked on nuclear fusion for years. It makes clean energy. It needs no fossil fuels. It will make the world greener. It could also lower fuel bills. The project is not ready for us to use. A scientist said it is an important step. He said it was a good start towards making nuclear fusion work.