Building a sun on Earth to produce unlimited, carbon-free energy may sound like science fiction, but it's not. It's a nuclear process called fusion, where two atoms join together and create an abundance of energy. Recreating the power of a star is no easy feat, but scientists across the globe are hard at work to make it a reality. From materials, to confining sun-hot plasmas, to fuel, there are a lot of scientific challenges to overcome to build a fusion reactor. In this episode, we talked to several Oak Ridge National Laboratory scientists about how they are tackling these problems and why the future of fusion looks brighter than ever right now.