Category: ScienceNews

Just one per cent of vehicles are powered by electricity, but CrowdScience listener Randall from Lac du Bonnet in Canada wants to know how quickly that might change, and whether one day all cars could be electric. Marnie Chesterton begins her journey in an electric car, stuck in traffic on a Los Angeles freeway.

It was in California where the modern electric car revival began in the late 1990s with the EV1 – popular with Hollywood celebrities like Mel Gibson and Danny DeVito. More than two decades on, several countries have pledged to go all-electric in future. The latest is China, who currently lead the world in the number of electric vehicles on the road. But is the planet’s power infrastructure even capable of supporting this global electric dream?

Marnie talks to experts about the practicalities of power supply and charging, takes a ride in an electric prototype with enough acceleration to impress even the most cynical petrol head and discovers an extraordinary vision for the future of personalised urban transport.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Marnie Chesterton Producer: Jennifer Whyntie

(Image: Electric power cord plugged in and recharging the electric vehicle Credit: Getty Images)

Nuclear weapons and mega asteroids: what would the aftermath look like? CrowdScience explores past extinction events and future dystopias.

In a past episode, CrowdScience headed to Denmark to find out whether humans could go the way of the dinosaurs – mass extinction triggered by a large asteroid impact 66 million years ago. Although no killer rocks are on route to Earth any time soon, we do not have to look far for other dystopias.

“Do we have enough nuclear weapons to destroy the world?”, listener Ronald from Uganda asks CrowdScience. It turns out there is a web app which can help answer this question. Together with its maker nuclear historian Alex Wellerstein, presenter Anand Jagatia tests hypothetical nuclear disaster scenarios and uncovers the nature of nuclear destruction in interviewees with climate scientist Alan Robock.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Anand Jagatia Producer: Louisa Field

(Image: Explosion of a nuclear bomb Credit: Getty Images)

CrowdScience is uncovering the super-powers of spiders, flies and the most irritating mosquitos.

Anand Jagatia meets spider specialist Jamie Mitchells at London Zoo to find out how spiders create such vast webs and speaks to researchers in Sweden about how they are trying and succeeding in recreating spider’s silk.

Rory Galloway heads to Cambridge University’s Fly Lab to find out how their tiny brains process the world up to four times faster than humans.

And Bobbie Lakhera is at the London School of Hygiene and Tropical Medicine to find out how attractive she is to mosquitos and how they use their super-senses to home-in on our blood.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Anand Jagatia Producer: Laura Hyde

(Image: Close-up of a Jumping Spider. Credit: Getty Images

Amid all the handwringing about kids and the damage smartphones are doing them, child psychologist Ioanna Palaiologou is upbeat. “I don’t think,” she says, “we should worry as much as the media is making it. ... If the elements are there, it’s another toy for them.”

Palaiologou, an associate at the Institute of Education, University College London’s Centre for Leadership in Learning, has the background to make a judgment in that regard. Among other things, she’s an expert on children and play, as she explains in this Social Science Bites podcast.

Play, she explains, is innate - “we are mammals, and mammals do play” – necessary and ultimately informal, she tells interviewer Dave Edmonds. That doesn’t meant there won’t be rules, but that the wellspring of play in bottom-up, from children, and not top-down, from adults. “Play cannot be initiated by adults. It can be supported by adults, it can be facilitated by adults, but cannot be initiated by adults, in my view. Play can only be initiated by children.”

This doesn’t mean play is anarchy, or even that all play is the same. Palaiologou has identified five types of play -- physical, with objects, symbolic (such as drawing), pretending/dramatic, and games with rules – and adults may have a role. But that role is not dominant: “Instruction is fine, but we actually need play to interact with the environment and to make sense of the world with our own senses, our own minds, and to internalize that.”

In the discussion, Palaiologou and Edmonds also talk about cultural differences in play and how it is a vital part of children’s emotional development. All work and no play, it seems, does more than make Jack a dull boy.

Palaiologou has spent more than two decades studying education and early childhood in the United Kingdom and is a chartered psychologist of the British Psychological Society and is the treasurer (and past chair) or the British Educational Studies Association. She is the co-director of Canterbury Educational Services where she is head of children’s services.

She’s published widely on early childhood, including authoring last year’s third edition of Child Observation: A Guide for Early Childhood and editing Early Years Foundation Stage: Theory and Practice and Doing Research in Education: Theory and Practice (the latter with David Needham and Trevor Male).

CrowdScience dives back into a debate about trees and their ability to tackle air pollution. Growing trees take in carbon dioxide and emit oxygen, but their leaves also attract tiny particles, which can get into our lungs and brains. So how good are they at cleaning our clogged up skies? Following on from our original programme, CrowdScience was contacted by a team of researchers in the UK who claim tress may be as much as 50 times better than previously thought at mopping up particles, and learn that hedges may help us stay healthy on roads. Also in the programme, we discover what pollutants are doing to our brains and reveal research which shows that keeping house plants can significantly reduce pollution inside the home.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Marnie Chesterton Producer: Marijke Peters

CrowdScience heads to the Sydney Science Festival in Australia where, from a special event at The Powerhouse Museum, we reveal answers to questions listeners have been sending in such as: What living thing has the most toxic venom? What is déjà vu? And why do our fingers wrinkle in the bath? To tackle our listeners’ questions about life, Earth and the universe, presenter Marnie Chesterton is joined by four special guests who will bring the good, weird and bemusing from the world of science to the stage.

Prof Shari Forbes, Professor in Forensic Science at the University of Technology Sydney,aims to help police and forensic teams establish a more precise time of death in missing person and homicide cases.

Dr Katie Mack is an astrophysicist at the University of Melbourne. Her work focuses on finding new ways to learn about the early universe and fundamental physics using astronomical observations.

Dr Jonathan Webb runs the science unit at ABC RN. He is also a former neuroscientist and a former science reporter for BBC News in London.

Dr Alice Williamson is a chemistry lecturer and researcher at The University of Sydney. She hosts a weekly science segment, Up and Atom on FBi Radio in Sydney, co-hosts RN’s Dear Science, and is a regular guest on Dr Karl's Shirtloads of Science podcast.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Marnie Chesterton Producer: Marijke Peter and Jen Whyntie

(Image: Koala in tree Credit: Getty Images)

Is it possible to get power from lightning? This was the first CrowdScience question posed by listener John Emochu in Kampala, Uganda, in November 2016. We revisit John’s story as presenter Marnie Chesterton goes hunting for answers at a lightning lab in Cardiff, Wales, where she discovers just what lightning lab is, and how to make a tiny – but very loud – lightning bolt. And we tackle the best of the many questions that came into our inbox about thunderstorms after the original broadcast – from how many types of lightning exist to whether antennae in the clouds could gather electricity. Finally, we head to Kampala to meet listener John to hear just what he thought of the programme and what life is really like in one of the lightning capitals of the world.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Marnie Chesterton Producer: Jen Whyntie

(Image: Artist impression of lightning inside a conical flask. Credit: Getty Images)

** Contains some upsetting scenes **

As a species, we humans can be uniquely horrible to our own kind. But are we the only animal to commit murder? Listener Michelle’s question sends CrowdScience trekking – and getting lost - in the Budongo rainforest in Uganda in search of one of Man’s closest relatives, the chimpanzee.

We hear from the scientists, who only days before the team’s arrival at the camp, witnessed a gang of chimps brutally killing another adult. But does chimpanzee lethal aggression pass muster as murder? We head to the capital Kampala for some legal advice and take a look at the grim history of putting animals on trial.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Geoff Marsh Producer: Louisa Field

(Image: Closeup of angry chimpanzee Credit: Getty Images)

Al Roth on Matching Markets

 

The system that runs the ride-sharing company Uber doesn’t just link up passengers and drivers based on price. It also has to connect the two based largely on where they are geographically. It is, says Nobel laureate Stanford economist Alvin E. “Al” Al Roth, a matching market.

In this Social Science Bites podcast, Roth explains to interview David Edmonds some of the ins and outs of market matching, starting with a quick and surprisingly simple definition.

“A matching market is a market in which prices don’t so all the work,” Roth details, “So matching markets are markets in which you can’t just choose what you want even if you can afford it – you also have to be chosen.” But while the definition is simple, creating a model for these markets is a tad more complex, as Roth shows in offering a few more examples and contrasting them with commodity markets.

“Labor markets are matching markets. You can’t just decide to work for Google – you have to be hired. And Google can’t just decide that you’ll work for them – they have to make you an offer.” And like say university admission, matching markets require something to intervene, whether it be institutions or technology, to make this exchange succeed. In turn Roth himself helped engineer some high profile matches in areas where the term ‘market might not traditionally have been used: kidney donors with the sick, doctors with their first jobs, or students and teachers with schools. Or even the classic idea of ‘matchmaking’ – marriage.

Roth turned to game theory to help explain and understand these markets, and his work won he and Lloyd Shapley the 2012 Nobel Memorial Prize in Economic Sciences. As the Nobel Committee outlined:

"Lloyd Shapley studied different matching methods theoretically and, beginning in the 1980s, Alvin Roth used Lloyd Shapley's theoretical results to explain how markets function in practice. Through empirical studies and lab experiments, Alvin Roth demonstrated that stability was critical to successful matching methods."

Roth is currently president of the American Economics Association, and sits as the Craig and Susan McCaw professor of economics at Stanford University. He is also the Gund professor of economics and business administration emeritus at Harvard University

 

How do we end up speaking the way we do? What's happening in our brains and mouths to make us sound so different from each other - even when we’re speaking the same language? This week on CrowdScience we return to our listener Amanda’s question of why there are so many accents, and discover more about what our accents say about us.

We visit Glasgow in Scotland, home to one of the most distinctive dialects of English, to see how social status and age affect the way we speak; and investigate another of our listeners’ questions: is there really such a thing as a ‘political accent’?

But how do babies pick up accents in the first place – and is it impossible to learn new sounds later in life? Presenter Nastaran Tavakoli-Far discovers something unexpected about her own accent, visits a voice coach to try and sound Texan, and uses ultrasound to try and get her tongue round new sounds.

And you can find out how much of an accent expert you are, by taking part in our online quiz.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk Presenter: Nastaran Tavakoli-Far Producer: Cathy Edwards

(Image: Woman holds hand near ear and listens carefully alphabet letters flying in. Credit: Getty Images)