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This week, as we count down the last few shopping days before Christmas, we've asked three scientists to each choose a favourite popular science book.

Broadcast Tuesday 13th December at 7pm

Producer Jeremy Grange stands in for a poorly Adam Walton this week. Jeremy is joined by biochemist Dr. Anna Croft from Bangor University; Dr. Jana Horak, Head of Mineralogy and Petrology at the National Museum Wales and computer scientist Dr. Tom Crick from Cardiff Metropolitan University as they discuss their favourite science books.

Anna's choice is , a collection of essays by the godfather of science fiction Isaac Asimov;

Jana selects by Cherry Lewis(Cambridge University Press);

Tom chooses a graphic novel about the life of the Welsh philosopher and mathematician Bertrand Russell. It's called by Apostolos Doxiadis and Christos Papadimitriou (Bloomsbury)