It goes without saying that breasts get a lot of attention. But less focus is given to the science behind them: why do we have them? Why are they all different, and does it matter? What happens when things go wrong?

GP and author Dr Philippa Kaye is out to change that in her latest book, Breasts: An Owner’s Guide. In today’s podcast she tells us about the science of human breasts, the benefits – and costs – of having them, current research in breast cancer and sports, and how to take care of yours.

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From HG Well’s The Time Machine, to Doctor Who and Back to the Future, time travel has become a beloved staple of science fiction. But will humans ever actually be able to jump through time? According to physics, quite possibly.

To explain this today, we’re joined by Lawrence Krauss, theoretical physicist and author of the new book The Known Unknowns: The Unsolved Mysteries of the Cosmos. He delves into the strangest theories of time travel, time tourism, and also what most time travel movies get wrong.

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Want to get better at interpreting body language? Well, most books on the topic are unlikely to help you. At least, that’s the argument of Geoff Beattie, professor of psychology at Edge Hill University.

He claims that most stereotypes of non-verbal communication, be it defensive arm-crossing or nervous hair twiddling, are vastly misunderstood. In this episode, Beattie unpacks these body language myths – and also explains science worth paying attention to.

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Artificial intelligence has seeped into the art world, creating incredible paintings, winning art competitions, and turning amateurs into Picasso. But how does it work, and can it really replace artists? We spoke to Ahmed Elgammal, a professor of computer science at Rutgers University to find out.

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Ever had an ‘aha’ moment? The point where your thoughts somehow finally coalesce into a revelation? Or have you ever wondered where your creative impulses come from and how they’re formed?

In this episode we speak to Hilde Ostby, author of the book The Key to Creativity, the Science Behind Ideas and How Day Dreaming Can Change the World. She tells us about nature of creativity, where it comes from and how we can nurture it in our own lives.

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Have you ever struggled to put that packet of biscuits back in the cupboard after opening them? Or found yourself dialling for your favourite takeaway more often than you’d really like to? If so, it sounds like you’ve been under the influence of ultra-processed food. But what exactly are they and what are they doing to our bodies when we consume them?

In this episode I speak to Dr Chris van Tulleken, BBC TV presenter and infectious diseases doctor based at the Hospital for Tropical Diseases in London. He tells me about the surprising discoveries he made about UPF when writing his latest book – Ultra-Processed People - Why Do We All Eat Stuff That Isn’t Food … and Why Can’t We Stop?

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As space travel becomes more common, questions are being raised over laws in space, how it will be split up amongst countries and even the risk of potential star wars. We spoke to author Tim Marshall to find out about the future of space politics.

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Out-of-body experiences have long fascinated humans, with accounts of people feeling as if they’ve floated above their own bodies going back thousands of years. But what causes them? Intriguing new findings by neuroscientists could provide some answers.

One such researcher is Dr Jane Aspell, head of the Self and Body lab at Anglia Ruskin University. She joins us to explain what happens in the brain during an out-of-body experience – and how virtual reality and the metaverse can replicate these events.

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About 1 in 10 people in the UK have dyslexia, which is a neurological difference that can result in difficulties learning to read and write. But what exactly causes it? Scientists aren’t in full agreement, but our guest this episode – Professor Usha Goswami, a leading neuroscientist at the University of Cambridge – poses one intriguing theory.

Her work so far suggests that dyslexia is not a visual disorder, but rather a difference in how sound and rhythm are processed in the brain. She joins us to explain all.

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In the not too distant future, we could all be wearing wearables that scan our brain waves, understanding how we feel, think and act. Before then, author Nita Farahany argues that we need to rethink our rules to privacy to include our brains.

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