Remember how UFOs used to be laughed at? The subject of conspiracy theories, the topic was part fringe, part sci-fi, with a little bit of innuendo about bodily probing thrown in for good measure. What a difference three years makes! In that time, the narrative has flipped 180 degrees, and the subject has come out of the fringe and into the mainstream. So what changed? As former PM Harold Macmillan is once reported to have said, ‘Events, dear boy, events’.

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