Where are the Time Travelers?

Einstein's theory of relativity suggests that time travel might be possible. We consider why this is true, and how one might build a time machine. We also consider the paradoxes involved with time travel and how they might be resolved. Presented by Dr. Robert Ehrlich, professor emeritus and former chair of the Physics and Astronomy Department at George Mason University. See http://mason.gmu.edu/~rehrlich for more details. Registration required. A Zoom link will be sent to registrants one day before the program. Register here: https://librarycalendar.fairfaxcounty.gov/event/7979664