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Strange Sea Worm 'Hallucigenia' Revealed in Full for First Time

It鈥檚 a spiky worm that lived in the sea 500 million years ago: scientists piece together one of nature鈥檚 strangest creatures. Dr Martin Smith from the University of Cambridge explains.

(Photo: Reconstruction of Hallucigenia Sparsa. Credit: Danielle Dufault )

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