Timothy J. Jorgensen is professor of radiation medicine and codirector of the Medical Physics Graduate Program at Georgetown University. He is the author of the award-winning book Strange Glow: The Story of Radiation (Princeton). He lives in Rockville, Maryland. Twitter @Tim_Jorgensen
![Spark: The Life of Electricity and the Electricity of Life / ]Ctimothy J. Jorgensen By Timothy J. Jorgensen Cover Image](https://images.booksense.com/images/158/248/9780691248158.jpg)