Deep Fission, a nuclear startup, has partnered with Endeavour to construct 2 gigawatts of subterranean nuclear power to meet the rising energy demands of data centers. Their innovative approach involves lowering pressurized-water reactors into a one-mile deep borehole, utilizing geological depth to enhance safety. The startup aims for a competitive cost of five to seven cents per kilowatt-hour, significantly less than existing nuclear power estimates. With plans to activate its first reactor by 2029, Deep Fission awaits regulatory approval under an expedited timeline, paving the way for a potential nuclear power renaissance in the U.S.