A consideration of whether alien life exists leads to an eye-popping journey from the moons of Jupiter to a distant galaxy. Hawking muses on what aliens may look like, what it means to call something alive and the likelihood of contact being made.
Hawking explores one of the world's favorite scientific questions, whether time travel is possible. He dives into the fabric of time and space to see if technology could ever make the dream a reality.
Stephen Hawking spans the entire life cycle of the universe, exploring how it began, how it creates stars, black holes and life, and how everything will end.