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How many balloons would it really take for Roald Dahl's Mrs Twit to lift off?
John Rutledge investigates the science behind Roald Dahl's stories
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In Short
The very best of Radio Wales - news, sport, entertainment, and your stories - in short.
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#RoaldDahl100—BBC Radio Wales's Favourite Roald Dahl Character
Exploring the life, stories, and characters of Roald Dahl, as we mark his centenary.
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