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The Big ThinkersEpisodes

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  2. How to Live Longer

    Sir Paul Nurse looks at what science can do to fix our bodies and extend our lives.

  3. Should We Go to Mars?

    Dr Kevin Fong looks into how practical it would be to send an astronaut to Mars.

  4. Aliens

    Astronomer royal Martin Rees and scientists take up the search for extra-terrestrials.