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Back to Earth 2
Episode 4 of 8
With the solar eclipse just hours away, Dara O Briain, Brian Cox and special guest experts are back at Jodrell Bank to answer viewers' questions. Apollo 11 astronaut Buzz Aldrin is on hand to explain why he believes humans must walk on the surface of Mars.
Last on
Thu 19 Mar 2015
23:20
麻豆社 Two Northern Ireland
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