An Oxford University study has concluded that if all the meat eaters in the UK cut down their ingestion of meat it would be the equivalent of taking 8 million cars off the road. Dr Ali Hill joins us from Otago University's Department of Human Nutrition.

Dr. Jean Twenge is a Professor of Psychology at San Diego State University, and the author of more than 140 scientific publications. She was last on RNZ six years ago discussing the less happy and more isolated smartphone generation of young people.

Do you ever hear a snippet of a tune and before you know it, it's on rotate in your head, and you can't seem to shake it for hours... or days, or even weeks? You're not alone. This pesky phenomenon - a catchy tune that runs through a person's mind - is known as an 'earworm'. A study of 240 American university students in 2020 showed 97% had experienced an 'earworm' in the past month. Professor Emery Schubert is from the School of the Arts and Media at the University of New South Wales.

At the Easter of 1939, on the cusp of WW2 and when Aucklander Johnny Green was just nine years old, his mother gifted him an egg cup. It featured three ceramic chicks, contained a single chocolate egg, and it meant the absolute world to him. Johnny kept it with him always, even when he joined the British Army, and made the six-week voyage to New Zealand. He now has a collection of more than 11,000 cups which he proudly displays at Sunday markets around Tamaki Makaurau to raise money for Hospice.

Dr Stephanie Dowrick is an award-winning writer, psychotherapy researcher and coach, public speaker, workshop leader, interfaith minister and the founder of The Women's Press in London. Her latest book Your Name is Not Anxious includes step-by-step guides that explain anxiety is treatable, despite more and more of us being or becoming anxious. Dr Dowrick gives us a preview of what we might learn in the 60-chapter read.

Whakatane-born Aaron Hodges' job as a fantasy writer allows him to live anywhere he wants. So in 2019, he moved to Buenos Aires to learn Spanish, and has been there ever since. Aaron calls home to tell us about life in the vibrant Argentinian capital.

A triumph on a tragic day; political parties roll out crime control policies; creative interpretations of a pretty prosaic political poll.

When All Blacks great Dan Carter retired from the game in 2021, he found no obvious career move at his doorstep. His new book, The Art of Winning: Ten Lessons in Leadership, Purpose and Potential, focuses on a series of hard-learned truths over his career and in the years to follow. Dan Carter tells us more about his new book, which he says, is not about rugby.

We've spoken before on Sunday morning about cats, dogs and cows, and how they reveal their affection for us. Research is making great strides in analysing animals we're familiar with and ascertaining their emotional states. That, of course, will allow us to improve their lives. Even if we then eat some of them. Dr Fay Clark runs the Comparative Challenge Lab at the University of Bristol. Her research is concerned with the mental processes and mental health of animals. Her training is in zoology, biological anthropology, and psychology, and in her lab, in zoos and in the wild she constructs challenges for animals to see how they respond.

Simon Schama is a pre-eminent historian and the author of The Power of Art, Landscape and Memory and Citizens, the story of the French Revolution. He's a Professor of History and Art History at Columbia University and is a well-recognised face on television from his many series like Civilisation and The History of Now. Well now he's written Foreign Bodies - Pandemics, Vaccines & The Health of Nations. Foreign Bodies is on the face it the stories of the bacteriologists and epidemiologists and other scientists who developed vaccines and saved the lives of millions, often in the face of considerable opposition and prejudice. But it merges that history with the now of Covid and the fear of what is coming next.