Chapter 10

In this chapter, Stephen Hawking discusses the possibility of time travel and wormholes, which are hypothetical shortcuts through space-time that could allow someone to travel from one place to another in a short period of time. He discusses the possibility of using wormholes or warping space-time to achieve time travel and the paradoxes that could arise from it. Hawking also introduces the alternative history hypothesis, which suggests that there may be multiple universes, and any changes made to the past through time travel would only affect a different universe. He also mentions the chronology protection conjecture, which suggests that it may not be possible for large-scale time travel to occur.