Several of the videos feature small labels saying they are "AI-generated" or contain "synthetic media", in line with Tiktok, Instagram and X's policies on AI media, but some people who had left comments told us they had been genuinely convinced by the posts.
When they began their first attempt of the walk, they were waved off by members of the local air ambulance crew.
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If plans by the UK’s science funding body go ahead, we won’t be able to benefit from Britain’s membership of Cern and other large international projects