Nicole Yunger Halpern re-envisions 19th-century thermodynamics for the 21st century, using quantum information theory. Thermodynamics---the study of energy---was developed to describe large systems such as steam engines. In contrast, small and quantum systems dominate much of today’s science, from quantum computers to molecules. Nineteenth-century thermodynamics—including concepts such as heat work, and efficiency—needs updating for the 21st century. For more information, see Yunger Halpern's research-group website.