 Dr Peter Nestor, Cambridge University December 2007
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 Professor Daniel Levitin, McGill University December 2007
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 Dr James Ost, Portsmouth University December 2007
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 Diran Onifade November 2007
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 Prof. Helen Rees, Dr Francois Venter & Dr Jocelyn Moyes, Witswatersrand University November 2007
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 Proessor Lee Burger, University of Witwatersrand November 2007
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 Professor Geoff Marcy, who's from the University of Berkley, November 2007
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 Case Rijsdijk November 2007
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 Kevin Fong November 2007
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 Brian Schmidt November 2007
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 Chris Vallance November 2007
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 Mark Peplow, Chemistry World November 2007
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 Giles Cardozo, Bear Grylls, Michael Vore November 2007
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 Professor Chris Turney, University of Exeter November 2007
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 Dr Anne Skinner, Williams College, Massachusetts November 2007
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 Dr Jenny Collier, Imperial College London November 2007
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 David Price, Science Made Simple; Johnny Ball October 2007
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 Professor Claudio Stern, University College London October 2007
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 Professor Roger Pedersen, Cambridge University October 2007
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