CrowdScience

This podcast explores the fascinating world of butterfly and moth flight, discussing their abilities to move erratically yet land precisely. It delves into the mechanics of their flight, including the vortexes of air generated by their wings and the complex muscle architecture inside their bodies. The podcast also explores how the scales on their wings reduce air resistance and reveals the incredible global migrations undertaken by some butterflies. Gerard Talavera's research on butterfly migration across Africa is also highlighted.

Two podcast hosts explore the weight of the internet by considering its physical infrastructure and data. They visit a museum in Cornwall to compare telegraph cables and modern fiber optics. They also discuss the weight of buildings and debate whether it should be included. Additionally, they explore the weight of modems, POPS, cables, and cell towers, and calculate that the internet weighs approximately 0.36 grams.

Dogs have been our best animal buddy for thousands of years. They’ve helped us out in countless ways from hunting alongside us to guiding us as service dogs. Talk to any pet owner and they’ll tell you how much joy their dog brings them. But you’ll also probably hear about vets bills, muddy footprints, or chewed up slippers. There are plenty of claims about the ways in which dogs might benefit our physical and mental health -- but how strong is the evidence?This week on CrowdScience, listeners Jason and Finn in Guernsey want to know if there’s any real evidence that our furry friends can benefit our health and wellbeing. Join Anand Jagatia as he enlists the help of his own pup, Stella, to explore the evidence. He uncovers the profound effects that service dogs can have on the mental health of military veterans in the US. Anand ponders the strangely unique relationship between humans and dogs and we learn about the surprising ways that about growing up with a pet dog can impact your health.Presenter: Anand Jagatia Producer: Emily Bird Editor: Richard Collings Studio Engineer: Donald MacDonald Production coordinator: Jonathan Harris, Elliott PrinceContributors: Dr Kerri Rodriguez Professor Tove Fall Professor Hal Herzog(Photo: Jack Russell leaping into the air trying to catch a ball. Credit: Brighton Dog Photography/Getty Images)

Imagine spending six months of every year living in total shade. That’s what life is like for residents of the Norwegian town of Rjukan, set so low in a valley that they see no direct sunshine at all from October to March. Marnie Chesterton heads there to hear about an ingenious solution: giant mirrors that beam rays down into the town square, where locals gather to feel the reflected heat. The man behind the project was motivated by a need for winter sun – but how much difference does it really make to our health and happiness? That’s the question posed by this week’s CrowdScience listener Michael, who has noticed living in the rainy Australian city of Melbourne is taking its toll. Many pensioners claim sunshine relieves achiness as well as conditions like arthritis but one of the biggest scientific studies found temperature has no real impact on reported pain levels, while factors like air pressure and humidity may play a role. When it comes to our mood, it seems that spending time outside is more important than feeling the heat. The optimum temperature for wellbeing is around a cool 19 degrees centigrade, while excessive warm weather has been linked to an increase in violence and crime. You can watch a visualisation of this episode on YouTube: Is the 'sunshine cure' a real thing? - CrowdScience, BBC World Service podcast - YouTube Producer: Marijke Peters Presenter: Marnie Chesterton Editor: Richard Collings Production co-ordinator: Jonathan Harris Contributors: Dr Anna Beukenhorst, University of Manchester Professor Oscar Ybarra, University of Illinois Professor Solomon Hsiang, University of California, Berkeley Martin Andersen, artist (Photo: Young woman enjoying sunset. Credit: Muriel De Seze/Getty Images)

Imagine spending six months of every year living in total shade. That’s what life is like for residents of the Norwegian town of Rjukan, set so low in a valley that they see no direct sunshine at all from October to March. Marnie Chesterton heads there to hear about an ingenious solution: giant mirrors that beam rays down into the town square, where locals gather to feel the reflected heat. The man behind the project was motivated by a need for winter sun – but how much difference does it really make to our health and happiness? That’s the question posed by this week’s CrowdScience listener Michael, who has noticed living in the rainy Australian city of Melbourne is taking its toll. Many pensioners claim sunshine relieves achiness as well as conditions like arthritis but one of the biggest scientific studies found temperature actually has no impact on reported pain levels, while factors like air pressure and humidity may play a role. When it comes to our mood, it seems that spending time outside is more important than feeling the heat and the optimum temperature for wellbeing is around a cool 19 degrees centigrade, while excessive warm weather has been linked to an increase in violence and crime.Contributors: Dr Anna Beukenhorst, University of Manchester Professor Oscar Ybarra, University of Illinois Professor Solomon Hsiang, University of California, Berkeley Martin Andersen, artist(Image: Man with smoke coming out of ears. Credit: Getty Images)

CrowdScience investigates the link between music and emotion to try and understand why certain songs can have such a profound impact on our mood.From breakup songs to upbeat holiday hits, many of us have made playlists that reflect how we feel, whether that’s down in the dumps or high as a kite. This week CrowdScience investigates the link between music and emotion to try and understand why certain songs can have such a profound impact on our mood. Presenter Anand Jagatia is surprised to learn that newborn babies are more likely to fall asleep when listening to fast tempo happy tunes than soothing sad lullabies, which may be because they’re attuned to multiple auditory stimuli after months in the womb. But later in life we actually seek out sad songs to make us feel better. The so-called ‘sadness paradox’ has been studied for many centuries. But what is it about melancholy music that might be good for us? Some scientists believe more empathetic people enjoy listening to these types of tune because they elicit a feeling of compassion towards others, which can be rewarding. A film composer tells us how scoring suspense isn’t simply about minor or major chords, or even what instruments you use – it all comes down to keeping the audience guessing about what’s coming next. (Photo: young woman listening to headphones looking sad. Credit: Getty Images)Presenter: Anand Jagatia Producer: Marijke Peters Production co-ordinator: Jonathan Harris Editor: Richard Collings Studio Technician: Phil Lander Contributors: Alex Heffes Professor Stefan Koelsch Dr Emese Nagy Associate Professor Jonna Vuoskoski Dr Scott Bannister

“I’m bored!” We can all relate to the uncomfortable - and at times unbearable - feeling of boredom. But what is it? Why does it happen? And could this frustrating, thumb-twiddling experience actually serve some evolutionary purpose? CrowdScience listener Brian started wondering this over a particularly uninspiring bowl of washing up and it’s ended with presenter Marnie Chesterton going on a blessedly un-boring tour through the science and psychology of tedium. She finds out why some people are more affected than others, why boredom is the key to discovery and innovation and how we can all start improving our lives by embracing those mind-numbing moments. (Photo: Bored kids on a park bench. Credit: Getty Images)Presenter: Marnie Chesterton Producer: Samara Linton Production co-ordinator: Jonathan Harris Editor: Richard Collings Contributors: Professor James Danckert, University of Waterloo, Canada Dr Elizabeth Weybright, Washington State University Dr Christian Chan, Hong Kong University Annie Runkel, University of Dundee

Why are some people left-handed? Why are some people right-footed? Why do some write with their right and throw a ball with their left? What does this all have to do with our brains? Why is it hard for some people to tell left from right? And what about animals? Can they be left-flippered, or finned, or southpawed? That's what a few CrowdScience listeners want to know, and we've got an expert panel on left, right and everything in between to help answer your questions. From genetics to culture, host Caroline Steel works to unpack what's known and what's still unknown about handedness. David Carey from Bangor University helps Caroline better understand her own mixed-handedness through a series of simple tests and shares some insights into what role handedness (and footedness) plays in the world of sports. Neuropsychologist Marietta Papadatou-Pastou from National and Kapodistrian University of Athens helps break down the numbers on left v. right-handedness and its cultural influences. To better understand the genetics and evolution of handedness, we hear from Sebastian Ocklenburg from Medical School Hamburg, who has investigated the phenomenon in other species. Throughout the show, Caroline tries to understand why handedness exists in the first place and why our species is so biased to the right. She tries to answer listener Barb’s question as to why ambidexterity isn’t more ubiquitous, and it leads to some brainy tangents. We also hear questions from listeners Scotia and Roland, and travel to India with BBC reporter Chhavi Sachdev to hear how cultural norms are not in favour of lefties. Presenter: Caroline Steel Producer: Sam Baker Editor: Richard Collings Production co-ordinator: Jonathan Harris Studio engineers: Tim Heffer, Steve GreenwoodFeaturing: Marietta Papadatou-Pastou, Neuropsychologist and Assistant Professor, National and Kapodistrian University of Athens Sebastian Ocklenburg, Professor for Research Methods, Medical School Hamburg David Carey, Reader in Neuropsychology, Bangor University (Image: Close up of group of hands raised. Credit: JGI/Getty Images)

CrowdScience listener Ali wants to know why we experience vertigo. Anand Jagatia finds out that it’s not just the giddy sensation we feel when we’re at the top of a mountain. Vertigo is also a physical illness that can be triggered by a range of disorders. He talks to leading experts on balance to learn what causes the condition, discovers how virtual reality can help people with a phobia of being in high places and volunteers to be turned upside down to experience what it feels like to be treated for vertigo. Contributors: Peter Rea, consultant ENT surgeon, University Hospitals of Leicester, Honorary Professor of Balance Medicine, De Montfort University, Honorary Professor in Life Sciences, University of Leicester, UK Tammy Barker, clinical scientist, Balance Centre, Leicester Royal Infirmary, UK Rupal Rajani, broadcast journalist and member of Life on the Level Tara Donker, clinical psychologist, Freiburg University, Germany Andrew Hugill, composer, musicologist and deputy director, Institute for Digital Culture, University of Leicester, UK Presenter: Anand Jagatia Producer: Jo Glanville Editor: Richard Collings Production co-ordinator: Jonathan Harris Sound design: Julian Wharton Studio manager: Bob Nettles With thanks to Andrew Hugill for permission to include his composition Verdigrade, commissioned by The Space as part of ‘Culture in Quarantine’, BBC.Image: CrowdScience presenter Anand Jagatia tries out a machine for diagnosing and treating vertigo at Leicester Royal Infirmary Credit: Peter Rea

We all enjoy a deep-fried Mars bar with french fries from time to time, but why do we crave these unhealthy foods instead of healthy things like spinach or broccoli? And what is a food craving? The answers lie in a complex blend of our psychology, physiology, and even sociology. BBC CrowdScience presenter Alex Lathbridge savours a mystery-meat crocket with the experts on a quest to discover the hidden sources and sauces of our food cravings.Presenter: Alex Lathbridge Producer: Richard Walker Editor: Richard Collings(Image: Stack of cheeseburgers and French fries. Credit: Dominic Lipinski/PA)