"Keep in mind that if you take a tour through a hospital and look at every machine with on and off switch that is brought into the service of diagnosing the human condition, that machine is based on principles of physics discovered by a physicist in a machine designed by an engineer."
American astrophysicist and science communicator. He serves as director of the Hayden Planetarium in New York and has hosted and produced science programming and media. He is widely known for public education work in astronomy.