Michael Rosen talks to conversation analyst Elizabeth Stokoe about the science of talk. Why infinitesimal pauses and saying hello matter, and the choice of 'speak' over 'talk' can save lives. Where does comedy get it right, and where does artificial intelligence get it wrong? Producer Sally Heaven.

From the greenhouse effect, through global warming to climate chaos, Michael Rosen talks to George Marshall about the best ways to communicate what's happening to the planet. Producer Sally Heaven.

Michael Rosen talks with Sara Wilcox, NHS content designer, about how they decide which words to use on the NHS website. Consultant Dr Hugh Rayner describes his initiative to encourage consultants to write letters to their outpatient clinic patients directly and in clear language, rather than via their GP. When it comes to the NHS, communication can be a matter of life or death. Subscribe to the Word of Mouth podcast and never miss an episode. Producer Beth O'Dea Related Links: The content style guide in the NHS digital service manual: https://beta.nhs.uk/service-manual/content The A to Z of NHS health writing: https://beta.nhs.uk/service-manual/content/a-to-z-of-NHS-health-writing Writing outpatient letters to patients: http://bmj.com/cgi/content/full/bmj.m24?ijkey=PKDrAMEdQAxS1w5&keytype=ref Please, write to me guidance: http://www.aomrc.org.uk/wp-content/uploads/2018/09/Please_write_to_me_Guidance_010918.pdf

Michael Rosen and Dr Laura Wright talk to Professor Dawn Archer about her work in evaluating deception: is it possible to tell when someone might be lying and what are the clues? Dawn shares her analysis of the language used in a news interview and a press conference by two men who were trying to deceive the public but were later found guilty of very serious crimes. Producer Beth O'Dea

Michael Rosen returns to explore how metaphors shape our lives with author James Geary. We live, breathe and think in metaphors and communication would be impossible without them. In a far-reaching conversation, Michael and James tease out what they are, why they exist and why we need them in our language. And how it is that the Greek word from which the English word metaphor is derived is still in everyday use in its country of origin. James Geary is the author of I Is an Other: The Secret Life of Metaphor and How It Shapes the Way We See the World.Producer Beth O'Dea

Michael Rosen explores the origins of English in the Anglo-Saxon world. Ancient riddles, poems and a multi-cultural Britain, in the company of historical linguist Dr Laura Wright and Professor Andy Orchard.Producer: Melvin Rickarby.

Michael Rosen looks at how English is used in Science. From the florid writings of the 17th century to modernist poetry and school experiments. With historian Charlotte Sleigh and historical linguist Laura Wright.Producer: Melvin Rickarby

Michael Rosen meets London-born writer Gabriel Gbadamosi, to talk Dickens and dialect. With historical linguist Laura Wright they look at Gabriel's novel Vauxhall, and how the types of English found on the streets of London find their way into his work, and that of Dickens, Chaucer and Henry Green.Producer: Melvin Rickarby

Michael Rosen looks at philosophy in English, from 17th century ideas to modern corporate slogans, via the daffodils of William Wordsworth. With historical linguist Laura Wright and philosopher Jonathan RéeProducer: Melvin Rickarby

Michael Rosen discovers how the Vikings changed English. These invaders brought with them the words knife, gun, slaughter, ransack and anger. But then they settled, using their anger, verbs and great hair to transform our grammar, and our understanding of the landscape. With author Eleanor Rosamund Barraclough and historical linguist Laura Wright.Producer: Melvin Rickarby