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Published on Jan 15, 2014
Over 2.5 million viewers, including many physicists, have been astonished by Steve Mould's videos of a chain flowing along its own length from a pot to the floor below. Apparently defying gravity, the chain rises above the pot as a fountain before falling down. Proceedings A has published a paper which explains why this fountain occurs by considering the forces bringing successive links into motion. In this podcast, authors Mark Warner and John Biggins explain what is going on.