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So much has been going on to celebrate the 50th of Doctor Who it is as if the whole world has been put into a temporary wibbly-wobbly timey-wimey state. from generations of people sitting down to watch old Doctor Who re-runs, to specials on the best monsters/villains, special merchandise and deciding to show the 50th Anniversary special in cinemas. On Friday, Professor Brian Cox, famous for his educational and highly informative and entertaining science shows, hosted a special lecture, specially recorded to try and answer questions that circulate around every Whovian’s mind: Is time travel possible? Do aliens really exist? Can I build my own TARDIS? (The answer to that one is no, unless you have a spare black hole handy.)