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Sasha Twining speaks to associate professor of ocean exploration at the University of Southampton

Dr Jon Copley took part in the first dives by human-occupied vehicles to 1 km deep in the Antarctic, during filming of the BBC's Blue Planet 2 series.

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5 minutes

More clips from Texting anniversary, national cohabitation awareness week and Professor of ocean exploration Dr Jon Copley

More clips from Sasha Twining