We need clean energy. Fusion energy has remained a pipe dream for years - but a German team may have got us a step closer. The W7-X reactor is a test of concept of something called a "stellerator" - which takes the tokamak design being worked on to contain a fusion reactor and twists it. This improves stability.
Of course, it still uses more energy to run than it produces, which has been the case with every fusion reactor designed so far, but it might well be a step closer to a feasible design.