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The fight over the Parthenon Marbles Nov 20, 2019

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Greece hopes to regain the ancient sculptures from the British Museum, which were taken from Athens two centuries ago by the Earl of Elgin.

Tamasin Ford is given a personal tour of the marbles by the museum. But Dr Elena Korka of the Greek Ministry of Culture expresses the outrage felt by her country at the loss of these national treasures, including statues that were physically dismembered in order for sections to be carted away.

Both sides assert a legal right to the marbles, although the matter has yet to be definitively settled. We hear the claims and counter-claims from barrister Geoffrey Robertson, as well as from Dr Tatiana Flessas, associate professor of law and the London School of Economics.

(Picture: A marble sculpture from the Parthenon in Athens depicting a battle between a centaur and a lapith, on display at the British Museum; Credit: Leon Neal/AFP via Getty Images)

Africa's tech hub explosion Nov 19, 2019

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What impact has it had on the continent's tech startup scene? Tamasin Ford speaks to Bosun Tijani, founder of the CcHub in Lagos, about why tech hubs have been so important in driving innovation in recent years, and Ghanaian entrepreneur Charles Ofori Antipem who discusses what tech hubs can do better. The BBC's Massa Kanneh reports from Liberia on the challenges affecting tech hubs in Africa's less developed countries.

(Photo: An IT professional in a server room, Credit: Getty Images)

The scramble for Nollywood Nov 18, 2019

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The international companies investing in Nigerian cinema. France's Canal+ and streaming giant Netflix are among those who see potential for Nollywood, both inside and outside Africa. Are they right? Presented by Tamasin Ford.

(Photo: Nollywood film DVDs on sale in Lagos, Nigeria, Credit: Getty Images)

Live long and prosper? Nov 15, 2019

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The longevity industry aims to let everyone enjoy a healthy, active life well past the age of 100. But the question everyone will be asking is... will it happen in my lifetime?

Manuela Saragosa reports from the Longevity Forum conference in London, where hundreds of researchers, investors, entrepreneurs and policymakers have gathered to try and answer this question.

Among them, she speaks to billionaire investor Jim Mellon; London Business School economist Andrew Scott; the youthful venture capitalist Laura Deming; Columbia University geriatrician Linda Fried; and cryonics fan Anders Sandberg of the Future of Humanity Institute.

Producer: Laurence Knight

(Picture: Retired couple larking about on a moped; Credit: stevecoleimages/Getty Images)

Quantum computers: What are they good for? Nov 14, 2019

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Google claims to have achieved a major breakthrough with "quantum supremacy". But what could quantum computers actually do, and how soon will they be useful?

Manuela Saragosa speaks to Harvard quantum computing researcher Prineha Narang, who says that the devices she is working on are annoyingly "noisy", but could still make an important contribution to tackling climate change in the next few years.

There are fears that quantum computers could one day crack modern encryption techniques - rendering private communications and financial transactions unsafe. But IBM cryptography researcher Vadim Lyubashevsky says don't worry, they've got the problem in hand.

Plus, the BBC's technology correspondent Rory Cellan-Jones delineates the greatest paradox of quantum computers - that nobody can explain how they work.

Producer: Laurence Knight

(Picture: Engineer working on IBM Q System One quantum computer; Credit: Misha Friedman/Getty Images)

The ethics of AI Nov 13, 2019

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One of the world's top thinkers on artificial intelligence, tells us why we should be cautious but not terrified at the prospect of computers that can outsmart us.

Professor Stuart Russell of the University of California, Berkeley, tells Ed Butler where he thinks we are going wrong in setting objectives for existing artificial intelligence systems, and the risk of unintended consequences.

Plus IBM fellow and computer engineer John Cohn talks about blockchain, deep neural networks and symbolic reasoning.

(Picture: Ponderous robot; Credit: PhonlamaiPhoto/Getty Images)

The billionaires who want to pay more tax Nov 12, 2019

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Liesel Pritzker Simmons and her husband Ian Simmons are billionaires who come from successful US business families. Liesel's family is best known for founding Hyatt hotels. Both say the the US government should be collecting more tax from super-rich people like them. We asked them why. And Dr Ted Klontz, associate professor of practice and financial psychology at Creighton University in the US, explains the psychology of a billionaire.

(Photo: A gold Ferrari parked outside an expensive boutique in London, Credit: Getty Images)

Who wants to be a billionaire? Nov 11, 2019

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Should the richest be taxed out of existence? Manuela Saragosa hears from Emmanuel Saez, a US-based French economist advising US presidential hopeful Elizabeth Warren on a wealth tax targeting the super rich. The arguments against taxing billinaires more come from Chris Edwards, an economist at the libertarian Cato Institute in Washington DC.

(Photo: Bill Gates and Warren Buffet at an event in 2017, Credit: Getty Images)

Fake me an influencer Nov 08, 2019

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The murky world of fake Instagram followers, fake comments, fake likes. Edwin Lane turns to the dark side in his quest for more followers for his Instagram account, with help from Belgian artist Dries Depoorter. Evan Asano from the influencer marketing company Mediakix describes how a mass following of bots almost landed him a marketing deal, and Andrew Hogue, founder of a company called Authentique, explain how artificial intelligence is being used to spot fake influencers.

(Photo: Instagram logo. Credit: Getty Images)

Make me an influencer Nov 07, 2019

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How hard is it to make money on Instagram? Ed Butler hears from successful influencer Laura Strange, who makes a living from her Gluten-free food themed profile, and the BBC's Edwin Lane tries to become an influencer himself, with advice from Harry Hugo co-founder of the influencer marketing agency Goat, and Marie Mostad, influencer expert at the platform Inzpire.me.

(Photo: Instagram logo displayed on a laptop. Credit: Getty Images)