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Professor Stephen Hawking reacts to news of New Horizons fly-by (Picture A model of the New Horizons spacecraft is seen at a live television program on NASA television celebrating the spacecraft"s closest proximity to Pluto, at Johns Hopkins University Applied Physics Laboratory, site of the mission operations center, in Laurel, Maryland, USA, This is the first mission to the Pluto System and the Kuiper Belt. Credit EPA/MICHAEL REYNOLDS)