Explain in brief, the theory of general relativity and why it shows (a) that space and time are unified and (b) that spacetime has a shape.

Explain in brief what the theory of quantum mechanics is and how Einstein laid its foundations.

What does Hawking mean when he says that the universe has multiple histories?

Does Hawking think that the laws of physics allow prediction the future? What might threaten such prediction? How might this threat be blocked?

Does Hawking think time travel is possible? How would it work? What is the probability of the possibility? Why?

What is Hawking's no-boundary condition? Hawking mentions it could have profound theological implications. What might they be?

What is the anthropic principle? How does Hawking use it in the book?

What is a "brane new world" and what does it suggest about our universe?

What does Hawking...