What sounds heavenly to one person might sound like boring noise to another - but why are our musical preferences so different? Is it all down to what we hear growing up, or are other factors at play?
CrowdScience listener and music lover Jocelyne from Canada wants to know why she has a different song for every mood, and why she likes different music from her friends and family.
Meanwhile in Italy, composer Elisabetta Brusa asks us whether the rules of harmony align with the laws of science, and should therefore not be broken.
We talk to both musicians and neuroscientists to explore the truth about harmony and discord. We find out how age, personality and experience all affect whether we find certain songs pleasing or offensive, and learn why the search for the true universals of music pleasure is a race against time.
Hypnosis has a long and controversial history, with its roots in animal magnetism or mesmerism, the theory developed by 18th Century German doctor Franz Mesmer. He believed he had discovered an invisible natural force possessed by all living things, and that he could channel this force for healing purposes.
Popularity of hypnosis has since waxed and waned, but was largely denounced as quackery until the 20th Century, when it began to be studied scientifically. However it is only in the last twenty years or so that is has become incorporated into mainstream science and medicine.
But is it a real phenomenon, asks listener Gratian from Poland; and Anton from Ireland wants to know how it works and what happens to people’s brains and bodies under hypnosis?
CrowdScience speaks to Dr Quinton Deeley, consultant psychiatrist and senior lecturer at the Institute of Psychiatry, who has used it in practice for many years, and Dr Amir Raz, a magician-turned-neuroscientist who is shedding light on how hypnosis works. To see how hypnosis is being used clinically, CrowdScience visits the Berkeley Clinic in Glasgow, Scotland, to witness a hypnotised patient having a tooth extracted with very little anaesthesia.
Meanwhile, presenter and self-confessed arachnophobe Nastaran Tavakoli-Far takes part in the Friendly Spider programme at London Zoo, an afternoon event that uses hypnotherapy and group therapy to ease or eliminate the fear of spiders.
Presenter: Nastaran Tavakoli-Far
Producer: Helena Selby
(Image: A silver pocket watch swinging on a chain on a black background to hypnotize. Credit: Getty Images)
Electric cars are labelled as ‘zero emissions’ vehicles – but what does that really mean? Jack Stewart puts your questions about EVs to the experts. According to a new report by the Union of Concerned Scientists, just how green your EV is compared to a petrol or diesel vehicle, depends on how the electricity powering the battery was produced, as well as how cleanly the battery itself was manufactured. Jack also explores what could be a compelling alternative to plugging in – filing up with Hydrogen, and creating nothing but water as exhaust.
Presenter: Jack Stewart
Producer: Rami Tzabar
(Image: Electric cars on charge. Credit: Getty Images)
How did humans diverge so markedly from animals? Apart from physical things like our “physical peculiarities,” as experimental psychologist Celia Heyes puts it, or our fine motor control, there’s something even more fundamentally – and cognitively -- different.
“I suppose at the broadest level,” Heyes tells interviewer David Edmonds in this Social Science Bites podcast, “we differ from animals because we are so ultra-social, so intensely cooperative. And as a result, we’ve transformed our environments, for good or ill, more radically than any other species through things like agriculture, technology, science, but also, law, trade to the point of economies and finance, fine arts, sports, all of these things.”
Heyes, a senior research fellow in theoretical life sciences at All Souls College, University of Oxford, argues that we’ve evolved those differences, or “innate modules.” That may sound like evolutionary psychology, which suggests that many of these traits are pre-coded into humans -- “we get them for free,” as Heyes translates -- and therefore are minimally dependent on what we experience in childhood. While Heyes appreciates the evolutionary aspect of natural selection and agrees there is some sort of genetic starter kit,” but she says the locus of evolution is not genetic but cultural.
She points to things like cross-cultural differences in beliefs and behavior or the ability to read, which hasn’t had time to be genetically encoded (even if it can be observed lighting up only certain parts of the brain) but it can have evolved culturally.
Heyes’ research and theories place her all over the academic map, but she describes herself as “part biologist, part philosopher, but I am first and foremost a psychologist.” A fellow of the British Academy and president of the Experimental Psychology Society, her latest book is the brand new Cognitive Gadgets: The Cultural Evolution of Thinking from Harvard University Press.
For some it's a way to get closer to God, for others a tried and tested way to lose weight - but listener Amine wants to know if fasting has any other, unexpected health benefits? So presenter Marnie Chesterton cuts down on cookies and investigates the science behind low-calorie or time-restricted eating. She hears how some cells regenerate when we're deprived of food, which one researcher says could reduce breast cancer rates. And she finds out what happens in our brains when our bodies rely on our own fat reserves for fuel.
Presenter: Marnie Chesterton
Producer: Marijke Peters
(Image: Clock on an empty plate. Credit: Getty Images)
Why is it that computers are so much faster than brains at some tasks?
Or could human brains one day be used to better effect? Listener Praveen from India was wondering how it can be that supercomputers are so very powerful compared to the human minds that created them. So CrowdScience, with the help of a small voice-activated guest presenter, is off to discover how the first computers remembered what they were told, how a million processors are being connected together to mimic a small percentage of a human brain, and how the mind-boggling speeds of modern computing is enabling the current leaps in artificial intelligence.
Producer: Alex Mansfield
Presenter: Marnie Chesterton
Speakers:
Sarah Baines, David Lewis - Museum of Science and Industry, Manchester
James Sumner, Steve Furber - University of Manchester
Aldo Faisal - Imperial College, London.
(Photo: 3D transparent human head and brain image. Credit: Getty images)
Kenyan listener Docktor can’t help himself. When music is playing he must move to the beat and he wants to know why. What role does dance play in human evolution? And what does dance mean to us? To help answer the many twists and turns in Docktor’s questions, the CrowdScience team heads to one of the most vibrant and diverse dance scenes in the World, Havana in Cuba. For Cubans dancing is at the heart of their cultural identity. They tell stories, bond with others, practice religion and celebrate their African ancestry through dance ¬– which came to Cuba with the slave trade.
For all humans, dancing is intimately connected to our love of music and is likely to be one of our oldest cultural practices. But why would our ancestors have wasted energy on what superficially seems to serve no survival benefits? Evolutionary anthropologist Bronwyn Tarr tells us that one clue lies in the brain. When we dance with others our brains reward us with a cocktail of feel-good hormones and this likely leads to profound social effects.
Presenter Anand Jagatia gets challenged on the dance floor, discovers how deeply rooted dance is in Cuban society and why we should dance more.
Humans have the potential to eat pretty much anything – but the reality is we don’t. Wherever we live in the world, we eat just a small fraction of the foodstuffs available and show strong preferences for certain foods over others. Those preferences can change dramatically from person to person, or as the saying goes – one man’s meat is another man’s poison. Then at the extreme end of the spectrum you get so-called ‘fussy eaters’ who reject so many foods that they are confined to beige diets of crisps, crackers and cereal.
So why do we show such different preferences for food? And why are some people fussier than others? That’s what CrowdScience listeners Orante Andrijauskaite in Germany and Anna Nicolaou in Belgium would like to know, and what Datshiane Navanayagam is off to find out.
She discovers how both biology and culture shape whether a food is disgusting or delicious and learns why we should stop giving children a hard time about finishing their dinner. She also learns how global cuisines evolved and what that can teach us about helping fussy eaters to overcome their food fears.
Presenter: Datshiane Navanayagam
Producer: Anna Lacey
(Photo: Fried Bugs in Bangkok night market. Credit: Getty Images)
In determining what makes a successful prison, where would you place ‘trust’? Alison Liebling, a criminologist at the University of Cambridge and the director of the Institute of Criminology’s Prisons Research Centre, would place it at the top spot. As she tells interviewer David Edmonds in this Social Science Bites podcast, she believes what makes a prison good is the existence and the practice of trust.
As this recording makes clear, these aren’t starry-eyed recommendations from a novice observer. Liebling has years of going into dozens of individual lockups, and believes that good prisons are possible. “A good prison,” she details, “is one where prisoners feel safe and the environment is not threatening – and therefore they can concentrate on their own personal development.” That environment means inmates are “reasonably decently treated, not worried about getting from A to B, the regime works in a fairly predictable and clear way, and the staff are approachable,” among other things.
While she has met with ‘why bother?’-type resistance from hard-boiled staff and prisoners surrounding her research, her retort is quick and usually effective: “There isn’t any better method than research for authentically describing this invisible world.”
The best prisons, she says, are the ones that “see prisoners as people first.” This isn’t a prescription to be naïve, and she subscribes to what Onora O’Neill describes as “intelligent trust” in dealing with prisoners. Good corrections officers already intuit the concept, she adds: they are “subtle readers of human behavior ... making fine judgements about gradations of trust.”
For her research, Liebling has adopted “appreciative inquiry,” which she came too almost accidentally while trying to discover a way to describe what works in a prison and how do prisons differ from each other. (“It wasn’t a research tool, or at least it wasn’t until I corrupted it!” she jokes.) Just as plants follow the sun, appreciative inquiry also follows the heliotropic principle, trying to identify and then support what gives life energy to people or organizations. “So instead of telling me about your offending,” she would ask, “tell me something you’re most proud of.”
Talk about working in the prison environment (“I always felt really at home”), the idea that prisoners themselves my feel vulnerable, how to build trust, and how prison policies have improved over Liebling’s career – and how that improvement has stalled
Liebling has published several books on these topics, such as 1992’s Suicides in Prison, 2004’s Prisons and their Moral Performance: A Study of Values, Quality and Prison Life and The Effects of Imprisonment with Shadd Maruna in 2005, and Legitimacy and Criminal Justice, an edited volume with Justice Tankebe, in 2013.
Carbon dioxide levels are far higher than at any other point in human history, thanks to our reliance on burning fossil fuels. But having pumped huge amounts of CO2 into the air, are there ways to get it back out again? If so, where would we put it all? And the big question: can that help solve our climate change problem, or is it a distraction from the urgent task of reducing our emissions?
When CrowdScience delved into ancient carbon dioxide levels last year, it sparked a flurry of emails from our listeners asking these questions and more, so this week we investigate our options for restoring equilibrium to our atmosphere. Since the CO2 came from deep underground - in the form of coal, oil and gas - can we put it back there? We travel to Iceland where they’re capturing carbon dioxide directly from the air - and turning it into rock.
Presenter: Marnie Chesterton
Producer: Cathy Edwards
(Photo: Nesjavellir geothermal power plant in Iceland. Credit: Getty Images)
