Space Boffins Sue Nelson and Richard Hollingham prepare for Tim Peake's launch to the International Space Station by speaking to Britain's first astronaut - Helen Sharman. ESA's Dr Volker Damann, Head of the Space Medicine Office, explains why space is bad for you and studio guests - rocket expert David Wade and space journalist Sarah Cruddas - share insights on the size of entrepreneurs' rockets and the future of Space 2.0.
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