Author: BBC World Service

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CrowdScience - Could a Robot be your Doctor?

Our listener Joseph’s question might sound more sci-fi than science show. But as Marnie Chesterton discovers, robots have already entered the realm of medicine and are likely to become more important in the future. A visit to the operating theatre at the University College Hospital in London together with surgeon Caroline Moore reveals that robots take the scalpels out of surgery by letting surgeons treat patients with prostate cancer without having to make a single cut. And chatting to Molly the robot alongside Dr. Praminda Caleb-Sully at Bristol Robotics Laboratory, Marnie discovers that robots could be the helping hand we need to look after a growing elderly population.

Machines win when it comes to data-processing. But what about empathy and intuition? Such characteristics would require machines to reach a level of artificial intelligence (AI) which critics say is decades away. The sceptics insist humans will always play a key role in healthcare. But others suggest that not only will AI change everything – but technology will one day eliminate the need for us to go to the doctor ever again.

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

(Image: Three Robots on Display at the Science Museum in London. Credit: Carl Court/Getty Images)

Presenter: Marnie Chesterton Producer: Louisa Field

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50 Things That Made the Modern Economy - Clock

There’s no such thing as “the correct time”. Like the value of money, it’s a convention that derives its usefulness from the widespread acceptance of others. But there is such a thing as accurate timekeeping. That dates from 1656, and a Dutchman named Christiaan Huygens. In the centuries since, as Tim Harford explains, the clock has become utterly essential to almost every area of the modern economy. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: A wall clock. Credit: Shutterstock)
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CrowdScience - Why are Cats Loners?

A few weeks ago, CrowdScience asked if it pays to be nice. We found that the answer is yes – if you’re a human. But if being social is so great, why aren’t all animals doing it?

That’s what our US listener Tony wants to know. After listening to ‘Does it Pay to be Nice?’ he rightly pointed out that cats lead mostly solitary lives - but don’t seem any worse off for it. So why have they taken this path? And are they any less advanced than a social species as a result?

Presenter and naturalist Tim Cockerill heads to the rainforests of Madagascar in search of answers. After lots of trekking through the undergrowth, he finds out why so many animals choose group living and what’s different about cats to make them go it alone.

But does it matter which way of life an animal takes? Tim discovers that for humans at least, being social has given us much more than we imagine.

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

Presenter: Tim Cockerill Producer: Anna Lacey

(Photo: Cat lying on floor. Credit: Getty Images)

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50 Things That Made the Modern Economy - Google

The words 'clever' and 'death' crop up less often than 'Google' in conversation. That’s according to researchers at the University of Lancaster in the UK. It took just two decades for Google to reach this cultural ubiquity. Larry Page and Sergey Brin – Google’s founders – were not, initially, interested in designing a better way to search. Their Stanford University project had a more academic motivation. Tim Harford tells the extraordinary story of a technology which might shape our access to knowledge for generations to come. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Google logo and search box on a screen. Credit: Yui Mok/PA Wire)
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CrowdScience - Is There Life After Death?

Death is one of life’s few certainties – or is it? To answer listener Pratibha’s question from New Delhi, India, presenter Marnie Chesterton asks medical and scientific experts if there is any evidence that humans could somehow come back into existence after their demise. We start at the end, by asking just what death is – and it turns out to be perhaps surprisingly complicated, especially if cold temperatures are involved. As another listener, Camilla, from Washington DC, USA points out, there are some animals that can become totally frozen over winter and return to life in spring. How does this happen, and could it have implications for the idea of deep-freezing humans – known as cryogenic preservation? Alternatively, if entire bodies might prove difficult to save, could we download our brains’ contents for later reboot instead? It sounds like science fiction, but a global network of scientists are pursuing the goal of cybernetic immortality: uploading our minds to an artificial brain in a robot avatar. Marnie heads to a brain-computer interface lab where she gets wired up to control a computer game by thinking, and discovers just how difficult it is to export thought, and how much we still have to learn about our brains. Could the way to cheat death ever be digital?

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

Presenter: Marnie Chesterton Producer: Jen Whyntie

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50 Things That Made the Modern Economy - Insurance

Legally and culturally, there’s a clear distinction between gambling and insurance. Economically, the difference is not so easy to see. Both the gambler and the insurer agree that money will change hands depending on what transpires in some unknowable future. Today the biggest insurance market of all – financial derivatives – blurs the line between insuring and gambling more than ever. Tim Harford tells the story of insurance; an idea as old as gambling but one which is fundamental to the way the modern economy works. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Lloyds Coffeehouse, Credit: Getty Images)
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CrowdScience - Should we Use Ships to Transport Fresh Water?

Earth’s surface may be 70 percent water but many places are struggling to access it. We look at a range of water supply options including delivering it by tanker. In Malta we meet a man trying to solve its water problems, with a clever contraption to recycle sewage.

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

Presenter: Marnie Chesterton Produders: Cathy Edwards and Marijke Peters

(Image: Tanker ship. Credit: Getty)

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CrowdScience - What is the Real Time?

It sounds like a simple question – what is the time? But look closer and you realise time is a slippery concept that scientists still do not fully understand. Even though we now have atomic clocks that can keep time to one second in 15 billion years, this astonishing level of accuracy may not be enough. The complexity of computer-controlled systems, such as high-frequency financial trading or self-driving cars which rely on the pinpoint accuracy of GPS, could in future require clocks that are even more accurate to ensure everything runs ‘on time’.

But what does that even mean? As Anand Jagatia discovers, time is a very strange thing. He visits the origins of modern time-keeping at the Royal Observatory in Greenwich and meets scientists at the National Physical Laboratory who have been counting and labelling every second since the 1950s. He meets Demetrios Matsakis, the man who defined time and visits the real-life ‘Time Lords’, at the International Bureau of Weights and Measures (BIPM) in Paris to find out how they co-ordinate the world’s time and why the leap second is ‘dangerous’.

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

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50 Things That Made the Modern Economy - Paper

The Gutenberg printing press is widely considered to be one of humanity’s defining inventions. Actually, you can quibble with Gutenberg’s place in history. He wasn’t the first to invent a movable type press – it was originally developed in China. Still the Gutenberg press changed the world. It led to Europe’s reformation, science, the newspaper, the novel, the school textbook, and much else. But, as Tim Harford explains, it could not have done so without another invention, just as essential but often overlooked: paper. Paper was another Chinese idea, just over 2000 years ago. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Stack of coloured paper, Credit: Laborant/Shutterstock)
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CrowdScience - Why are Dogs so Different?

From Chihuahuas to Great Danes, Mexican Hairless to Afghan Hounds, dogs are the most diverse mammal on the planet. There are currently over 500 recognised breeds worldwide with almost every conceivable combination of size, shape, coat, colour and behaviour.

But why are there so many different kinds of dog?

That's what listener Simon St-Onge in Quebec, Canada wants to know – and CrowdScience has taken up the challenge.

Presenter Marnie Chesterton heads to Sweden, a world-class centre of canine research, to sniff around for answers. She finds out how the grey wolf morphed into the vast variety of dogs we have today, and heads out on a moose hunt with one of Scandinavia's most ancient breeds.

But are dogs really as different as they seem on the surface? The dog genome is revealing more about man's best friend than ever before – and could now be the answer to understanding both dog and human health.

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

(Image: Tika, the Russian-European Laika)