Author: BBC World Service

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World Book Club - Robert Harris – Imperium

This month World Book Club visits the Oxford Literary Festival in the elegant surroundings of Worcester College, part of the university and is talking to the hugely popular British author Robert Harris with an audience about the first of his bestselling Roman trilogy, Imperium. The setting is Ancient Rome, a city teeming with ambitious and ruthless men, but none more brilliant than a rising young lawyer Marcus Cicero who decides to gamble all on one of the most dramatic courtroom battles of all time. Scrupulously researched and vividly imagined Imperium brings to life the cutthroat politics and the timeless pursuit of power as one man seeks to attain supreme authority within the state.

(Picture: Robert Harris. Credit: BBC.)

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World Book Club - Joël Dicker – The Truth About the Harry Quebert Affair

This month World Book Club are once again part of The Hay Literary Festival in Cartagena, Colombia. Harriett Gilbert and a Festival audience talk to the acclaimed Swiss writer Joël Dicker about his gripping and chart-topping novel The Truth About the Harry Quebert Affair. A famous American writer suddenly finds himself the main suspect in a 30 year-old cold case in his sleepy home town in New England. His former student, a novelist desperate for material, appears as his only saviour. The Truth about the Harry Quebert Affair is a fast-paced, tightly plotted, literary thriller, and an ingenious book within a book by a dazzling young writer.

(Picture credit: Valery Wallace Studio.)

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World Book Club - Laura Restrepo – Delirium

This month World Book Club are lucky enough to be in the beautiful old city of Cartagena in Colombia as part of the Cartagena Hay Festival of Literature. Harriett Gilbert will be talking to one of Colombia’s most acclaimed writers Laura Restrepo about her haunting novel Delirium and learning something about this stunning country’s troubled recent past.

Returning home after a business trip to discover his beloved wife Agustina has gone mad her kindly husband Aguliar delves back into her shadowy past to try to understand what has happened. Eventually he discovers the key to her madness buried deep in a Colombian story of money, power and corruption.

(Picture Laura Restrepo with Harriett Gilbert. Credit: BBC.)

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50 Things That Made the Modern Economy - Air Conditioning

Tim Harford tells the surprising story of air conditioning which was invented in 1902 to counter the effects of humidity on the printing process. Over the following decades “aircon” found its way into our homes, cars and offices. But air conditioning is much more than a mere convenience. It is a transformative technology; one that has had a profound influence on where and how we live. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Air conditioning vent, Credit: Dorason/Shutterstock)
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CrowdScience - How Many People Can Earth Support?

Our planet is getting rather cosy. In just over 200 years, the global population has grown from 1 billion to almost 7.5 billion – and the best estimates suggest it’s going to keep on increasing. But just how far can it go? When will we reach ‘peak human’? That’s what CrowdScience listeners Alan Donaldson and Francoise Brindle want to know: what’s the latest estimate for how many people the Earth can support?

It’s a question that’s been bothering some of the world’s greatest thinkers for hundreds of years, and now presenter Marnie Chesterton goes on her own quest for answers. Her journey takes her through the technology and innovation that keeps our growing population alive, and she looks to Dhaka, Bangladesh, to find out what a more densely populated world might feel like. But are there signs that things are already levelling off? And could improving photosynthesis allow populations to grow without destroying the environment?

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

Presenter: Marnie Chesterton Producer: Anna Lacey

(Image: People on busy street. Credit: Getty Images)

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50 Things That Made the Modern Economy - Elevator

In 1853 Elisha Otis climbed onto a platform which was then hoisted high above a large crowd of onlookers, nervy with anticipation. A man with an axe cut the cable, the crowd gasped, and Otis’s platform shuddered – but it did not plunge. “All safe, gentlemen, all safe!” he boomed. The city landscape was about to be turned on its head by the man who had invented not the elevator, but the elevator brake. As Tim Harford explains, the safety elevator is an astonishingly successful mass transit system which has changed the very shape of our cities. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Modern Elevator, Credit: iurii/Shutterstock)
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CrowdScience - Space Mining

Mining asteroids, moons or even other planets has remained firmly within the realm of science fiction. But as certain elements become increasingly scarce on Earth, private companies and even nation states are looking to make extra-terrestrial mining a reality. Presenter Marnie Chesterton heads to an Earth-based mine in Scotland to see just how tricky space mining could be, and what possibilities it holds. On the way she discovers what laws govern this new far frontier, and hears from a space prospector who already has designs on key sites for exploration. Could our solar system's asteroids really become self-fuelling gas stations for spaceships?

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: Double the Rubble Artist Concept. Credit: NASA)

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50 Things That Made the Modern Economy - Contraceptive Pill

The contraceptive pill had profound social consequences. Everyone agrees with that. But – as Tim Harford explains – the pill wasn’t just socially revolutionary. It also sparked an economic revolution, perhaps the most significant of the late twentieth century. A careful statistical study by the Harvard economists Claudia Goldin and Lawrence Katz strongly suggests that the pill played a major role in allowing women to delay marriage, delay motherhood and invest in their own careers. The consequences of that are profound. Producer: Ben Crighton Editors: Richard Knight and Richard Vadon (Image: Oral contraceptive pill, Credit: Areeya_ann/Shutterstock)
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CrowdScience - Should we eat Insects?

For most people the idea of chewing on a caterpillar or tucking into a tarantula is pretty unpalatable. Yet according to the United Nations, some two billion people around the world consume insects regularly. This prompted World Service listener Saman from Pakistan to ask the BBC CrowdScience team “are insects a serious food source?”

To tackle this question, we head to Burkina Faso in West Africa where shea caterpillars are an important part of the local diet in a place where food security is low and malnutrition is high.

Here we follow scientist Charlotte Payne as she tries to crack the tricky science behind the caterpillar’s life cycle and see how local entrepreneur Kahitouo Hien is trying to change lives and reduce malnutrition with edible caterpillars.

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: Bowl of cooked Caterpillars. Credit: BBC/Anand Jagatia)