Electricity makes our home appliances go, and it also animates the human body. Timothy J. Jorgensen is professor of radiation medicine and biochemistry and director of the Health Physics and Radiation Protection Graduate Program at Georgetown University. He joins host Krys Boyd to discuss advances in our understanding of the connection between electricity and the nervous system – and how these discoveries are changing how we live. His book is called “Spark: The Life of Electricity and the Electricity of Life.”