University of Colorado Professor of Physics Paul Beale returns to the show to talk about an apparently successful nuclear fusion test. Sounds exciting but as the article notes, "nuclear fusion has a long history of overpromising and under-delivering, despite massive capital expenditures...." US scientists achieve ‘holy grail’ nuclear fusion reaction: report | The Independent
Fusion energy, the 'holy grail' of clean power, a step closer to reality - The Washington Post