Could space-going billionaires be the vanguard of a cosmic revolution?

Wealthy thrill-seekers are required for space exploration to progress. The space race between the USSR and United States seems like ancient history today. However, astrophysicists are still filled with nostalgia for our golden age. Now, as our technology has burgeoned, we could be on the cusp of an era of space exploration that makes the lunar landings seem small in comparison. Martin Rees breaks down our evolving technology and how we could be on the brink of starting the transition to electronic entities, spreading our influence and discovering what lies beyond the confines of Earth.