Explore cutting-edge challenges in sustainable energy through a unique colloquium featuring three distinguished speakers. Delve into unsolved physical science problems crucial for transitioning to a sustainable world. Learn about the quest for securing fuel for practical fusion power plants, investigate fundamental efficiency limits on energy storage, and examine the development of batteries for electric vehicles and utility-scale storage. Gain insights from Steven Chu of Stanford University, Steven Koonin of New York University and Hoover Institution, and Robert Laughlin of Stanford University as they present their perspectives on these critical issues in applied physics and sustainable energy research.