Dr. Weiss provides a short and simple explanation of how to find a gravitational wave, a discovery that proved a prediction that Einstein made 100 years earlier. He describes how his team developed the LIGO detector to search for these elusive events and how they can be used to better understand the cosmos. In 2017, Dr. Weiss was awarded the Nobel Prize in Physics, along with Kip Thorne and Barry Barish, for seminal contributions to the LIGO detector and the observation of gravitational waves. Dr. Weiss is Professor of Physics, Emeritus, at MIT. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx