What’s your favourite food? A hamburger, a slice of cake, a pizza? Eating is something we all do every day but most of us rarely think about what actually happens in our bodies after we put food into our mouths.

In this episode, we catch up with Dr Chris Van Tulleken to speak about his forthcoming Royal Institution Christmas Lecture series telling us everything we need to know about what’s happening in our bodies when we eat.

He tells us what actually happens when we put food into our mouths, what’s going on in our bodies once food is in there, and why farting is just part of the process.

BBC Four and iPlayer, 9pm, on 29, 30 and 31 December.

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Anyone who has switched on the news even briefly this year will no doubt have seen scenes of extreme flooding occurring in all corners of the globe. But are these events getting more frequent and more severe or are we just becoming more aware of them?

In this episode, we catch up with Prof Trevor Hoey, a hydrologist based at Brunel University, London.

He tells us about the various climate mechanisms driving these extreme weather events, how counterintuitively severe droughts are being caused by the same processes and he also details some of the measures we can take to minimise the damage these events cause.

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Be it down to our professions, taste in music or favourite sports teams we all belong to several different tribes. But what drives this instinct and what purpose does it serve?

In this episode, we speak to cultural psychologist Prof Michael Morris about his latest book: Tribal – How the Cultural Instincts That Divide Us Can Help Bring Us Together.

He breaks down the influence our peers have on us, explains why we look up to hero figures and why tradition has such a huge impact on our beliefs, lifestyles and identities.

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Why do we humans seem to be so easily influenced or even fooled? On one hand this can be done for entertainment, in a Las Vegas stage magic show for example, but on another it can be used for more nefarious purposes such as con artists tricking people into sharing their bank account details.

In this episode, we speak to science writer and BBC Science Focus contributor Brian Clegg to talk about his latest book: Brainjacking – The Science of Influence and Manipulation.

He tells us how our emotions can make us susceptible to being tricked, the role advances in technology such as AI are increasingly playing in our ability to manipulate others and how the whole phenomenon stems from our love of a good story.

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Through emojis, memes, acronyms and inside jokes, the internet has forever changed how we communicate. But what is the result of that and what does it mean for how we’ll speak in the future? We spoke to linguist and author of the book Because Internet, Gretchen McCulloch, to find out.

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The Earth’s population currently stands at more than 8 billion and shows no signs of slowing down any time soon. There’s little doubt that these staggering numbers are placing a huge strain on global food supplies, so what can be done for the human race to thrive and survive long into the future?

In this episode, we catch up with multidisciplinary researcher and author Prof Vaclav Smil to talk about his latest book – How to Feed the World.

He tells us how evolution has determined the staple foods we now rely on for nourishment, how this influences our chances of continued survival and why technology is yet to find a viable solution to the urgent issue of feeding the world.

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Living through a mass extinction means the end of a species’ existence inevitably collides with significant events in our personal lives. But what does that mean for the people working to protect them? And why are these extinctions actually bringing them hope? We spoke to science writer Tom Lathan, author of the new book ‘Lost Wonders’, who explains.

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From the distinctive caw of a crow to the musky scent of a beaver, the world around us is filled with the telltale signs of animals going about their daily business. But how can we teach ourselves to pick up on them more effectively and what can we learn from doing so?

In this episode, we catch up with ecologist and author George Bumann to talk about his latest book, Eavesdropping on Animals: What We Can Learn from Wildlife Conversations.

He tells us how by simply opening our eyes, ears and noses when we’re out we can begin to tune into to our environment more closely and in turn learn more about the lives and behaviours of the animals we share it with.

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It’s likely that even the most virtuous amongst us has experienced feelings of anger at some point in our lives. But is this simply a failing in our personal moral fabric or does it have more universal biological origins?

In this episode, we catch up with Guy Leschziner, a professor of neurology and sleep medicine at King’s College Hospital in London to talk about his latest book Seven Deadly Sins: The Biology of Being Human.

He tells us how activity in the emotional regions of our brains affects our behaviour, talks about the influence of testosterone on our aggressive tendencies and tells us how mutations in specific genes can predispose us to commit violent acts.

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As the nights draw in and the temperature drops, many of us find ourselves feeling a little less jolly and a bit more sluggish than usual. But for some of us these feelings can become so severe that they are classed as a form of depression known as seasonal affective disorder. This can have a significant impact on our daily habits, relationships and ability to perform at our best.

In this episode, we catch up with the founder of The Sleep Scientist Dr Sophie Bostock.

She tells us how exposure to daylight affects our mood, why it’s natural to want to hunker down during the colder, darker months and how going on a daily morning walk can help us all to lift our spirits.

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While being cynical can feel safe, and prepared for the worst outcome, it could actually be harming your health. We spoke to Jamil Zaki, author of the new book Hope for Cynics to better understand the dangers of cynicism and how to break out of it.

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