As a cell biologist, Sundar Balasubramanian never forgot his rural southern Indian roots, or the traditional practices his uncle, the village healer, exposed him to. Today, as a researcher and assistant professor at the Medical University of South Carolina, Balasubramanian has turned his focus back to those roots — specifically, to pranayama, a deep-breathing relaxation technique. He’s showing that this ancient yoga practice is about more than relaxing — it can change us at the cellular level.