The movement of human beings off the planet out into the Universe; first the Moon, and then Mars, and then who knows where, is just beginning and there is nothing that can stop it."
In this exclusive clip, Tyson asks Hawking your standard softball interview question: what was around before the big bang? In other words, what happened before the moment the universe began?
From the Apollo missions to the Falcon Heavy test launch, humanity has seen some incredible spacecraft head toward the stars. Here are 24 famous rockets and space shuttles as they left Earth to explore the cosmos.