"I remember a few people said that the place where Proxima is today was impossible," says Francesco Sciortino, the co-founder and CEO of Proxima Fusion. Being accused of attempting the impossible is not unusual for the scientists and engineers working on nuclear fusion projects around the world. After all, they are attempting to capture, on earth, the reaction that powers the Sun. Success could mean abundant, cheap and emission-free electricity. But the challenges are daunting and a working