What would it take to turn the power of the stars into clean, abundant electricity on Earth? (Original 3 hours → Summary 7 minutes) In this concise version of Lex Fridman’s conversation with David Kirtley, you’ll get the core ideas on fusion, plasma physics, and Helion’s field-reversed configuration approach. Hosts and guest: Lex Fridman and David Kirtley unpack why deuterium fuel is effectively limitless, why fusion is fundamentally safe, and how pulsed, high-field machines plus direct electricity extraction could change plant design and economics. Learn about confinement challenges (N, T, τ), modern diagnostics and controls, rapid prototyping culture, grid integration, and the geopolitical implications of distributed fusion. Keywords: fusion, plasma physics, Helion, field-reversed configuration, deuterium, pulsed fusion, direct electricity. Listen now to get the key ideas in minutes.