“There are a lot of things you can do in space, and space essentially is unlimited resources. We are climbing over ourselves here looking for the next source of energy. The universe has an unlimited source of energy.”

American astrophysicist and science communicator of the late 20th and early 21st centuries, he bridges complex cosmic concepts for broad audiences. His work on the Cosmos television series and public lectures makes astronomy accessible, while his writings and media appearances champion evidence-based reasoning and critical thinking.