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Hydrogen Icebergs in space? The mystery of 'Oumuamua
When a strange spinning cigar-shaped object was spotted travelling through our solar system in 2017, it ignited scientific speculation and debate. Ian Sample speaks to Darryl Seligman, lead researcher on a recent study seeking to unravel the mystery of ‘Oumuamua. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>