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We live in a dark Universe. Mysterious 'dark matter' seems to hold the cosmos together, but we don't know what it is! Join University of Cambridge astronomer Dr Matt Bothwell as we try to shed some light on what this 'dark matter' could be.
This is going to be an interactive session, where you'll have the chance to ask (and answer) questions -- go to www.sli.do/ and use the code 'dark' to join in!