This week, Kate Simpson introduces us to the precarious and vital world of the gastropods; and James McConnachie plunges into the teeming waters of the St George’s Channel.

‘A World in a Shell: Snail Stories for a Time of Extinctions’ by Thom van Dooren

’The Turning Tide: A Biography of the Irish Sea’ by Jon Gower

Produced by Charlotte Pardy

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