What is the universe made of? -- How did life begin? -- Are we alone in the universe? -- What makes us human? -- What is consciousness? -- Why do we dream? -- Why is there stuff? -- Are there other universes? -- Where do we put all the carbon? -- How do we get more energy from the sun? -- What's so weird about prime numbers? -- Can computers keep getting faster? -- When can i have a robot butler? -- Will we ever cure cancer? -- What's at the bottom of the ocean? -- What's at the bottom of a black hole? -- Can we live forever? -- How do we solve the population problem? -- Is time travel possible?.