"Nuclear Winter" is a 12-minute documentary produced by Retro Report for The New York Times, featuring reporter Kit Roane. The film revisits the 1980s theory proposed by Carl Sagan and other scientists, which suggested that a large-scale nuclear war could trigger a "nuclear winter," plunging the Earth into a severe and prolonged global cooling. The documentary examines the scientific debates surrounding this hypothesis during the Cold War era and explores its relevance in contemporary discussions on climate change and geoengineering.