The Inquiry

North Korea has been under sanctions for many years. But this isolated economy is showing signs of life that might surprise you. From hacking and counterfeit money to coffee shops in Pyongyang, we investigate what life is like in North Korea and how the state makes its money.Presenter: Celia Hatton Producer: Josephine Casserly(Photo: A woman shopping at the Kwangbok, or 'liberation', department store in Pyongyang. Credit: Ed Jones/AFP/Getty Images)

Armenia's recent successful uprising is being celebrated as unprecedented for a former Soviet state. The so-called “velvet revolution” began on the last day in March with a protest walk. It ended two weeks and 100km later with the government overthrown.Yet revolutions rarely triumph. In this Inquiry we look at the factors that need to come together for such a revolution to succeed. Do they always need to be bloody and brutal or can non-violence resistance be as effective? How important are state institutions like the military to determining success? And what role do international relationships have to play?(Photo: Supporters of Armenian opposition leader Nikol Pashinyan celebrate at the central square of Yerevan, 2 May 2018. Credit: Vano Shlamov/AFP)

Not long ago, they were calling each other names and raising fears of a nuclear war. Now, it is feasible they could together win the Nobel Peace Prize - if they can reach a deal. The mooted meeting between America’s Donald Trump and North Korea’s Kim Jong Un could go wrong in many ways. Mr Trump has already talked of walking out. But in a spirit of optimism, this week’s Inquiry hears from those who have brokered some of the world’s most unlikely pacts for advice on how to strike the deal of a lifetime. With Helena Merriman.(Photo: President Trump, Credit: Zach Gibson/Getty Images; Photo: Kim Jong Un, Credit: Korea Summit Press Pool/Getty Images)

In late December 2017, one of the world’s leading neurobiologists died of pancreatic cancer. His name was Ben Barres. He was an extraordinary scientist, advancing our understanding of how the brain works, in particular how certain cells in the brain may contribute to degenerative brain diseases like Alzheimer’s and Parkinson’s.He had also lived the last 20 years of his life as a transgender man. He used his unique perspective of having ‘lived in the shoes of a woman and…the shoes of a man’ to become an outspoken opponent of gender bias.As the voice of the transgender community continues to grow in influence, what can wider society learn from people who’ve been in this rare position of living life as both a perceived man and woman? What does their experience tell us about the nature of gender bias? And does it help us fix it?(Photo: People hold a giant transgender flag at a gay parade. Credit: Bulent Kilic/AFP/Getty Images)

Black infants in America are twice as likely to die in their first year as white infants. This stark disparity has long puzzled doctors and researchers. Why are so many African-American babies dying?(Photo: A medical assistant measures the head of a newborn baby during a check-up in the USA. Credit: John Moore / Getty Images)

Syria, Salisbury, Malaysia Airport – all sites of nerve agent attacks carried out in the past couple of years. Yet hundreds of countries have supposedly destroyed their stockpiles of chemical weapons. It’s also illegal to produce and use them.We look to four of the world’s most experienced chemists and researchers to tell us more about the nerve agents used in these recent attacks, how they are regulated and the ongoing problems of getting rid of them.(Photo: Members of the emergency services in green biohazard encapsulated suits. Credit: Ben Stansall/AFP/Getty Images)

China’s ivory market is now closed for business. The country has long been one of the world's biggest consumers of ivory. But as of this year, buying and selling ivory in China is illegal. Carving factories, workshops and jewellers have all shut their doors. How did this happen? And will it be enough to save the African elephant?(Photo: An African Elephant throws mud onto himself, Mpala Research Centre, Kenya. Credit: Simon Maina/Getty Images)

When Robert Mugabe was deposed last year, he had ruled Zimbabwe for nearly four decades. How do dictators and authoritarians stay in power? James Tilley, a professor of politics at Oxford University in the UK, finds out what's in the dictators' survival guide. How do they control ordinary people and stop revolts? How do they stop rivals from taking over? And why are elections often helpful to securing their rule? Producer: Bob Howard.(Photo: Zimbabwean President Robert Mugabe looks on during his inauguration and swearing-in ceremony on August 22, 2013 Credit: ALEXANDER JOE/AFP/Getty Images)

The tide of public opinion is turning on plastic.The image of a whale with plastic stuck in its mouth on the BBC nature documentary Blue Planet 2 woke people up across the world to the reality of plastic pollution in our oceans. Experts think that by 2050, there could be more plastic than fish in the sea. Communities across the globe are saying that something must be done.But does this change in public mood spell disaster for plastic? And if so, what would replace it? We go from Europe, to the US and Indonesia to examine the supply and demand of plastic. Presenter: Michael Blastland Producers: Josephine Casserly and John Murphy

“Humans are the only species that willingly deprive themselves from sleep”. Ever since fire was discovered, we have traded off sleep time for other activities - from creating stone tools to partying. As our technology progressed, the list of things to do rather than sleep just got longer. But with sleep deprivation now a growing health problem, could we be reaching our limits? Or is tiredness part of our condition? In this week’s programme, an evolutionary biologist, a historian and a neuroscientist give us their take on whether we are now any more tired than our ancestors. We hear what makes human sleep unique and how it has evolved in surprising ways. And finally we hear from a woman with a dream – that we may never have to sleep again. Presenter: James Fletcher Producer: Estelle Doyle and Sarah Shebbeare This programme was first broadcast in July 2017.(Photo: A woman shows signs of tiredness as she counts ballot cards. Credit: Leon Neal/Getty Images)

From courtrooms and prisons to rehab centres and martial arts training. We look to Europe, Iraq, Central Asia and Saudi Arabia to investigate how they are dealing with Islamic State militants.The defeat of Islamic State in Iraq and Syria has raised a new, global challenge. While Iraq is funnelling huge numbers of Islamic State suspects through its courts, thousands of foreign fighters are returning to their home countries. What is happening to former IS fighters?(Photo: A man takes down a poster of the IS militant group's flag. Credit: Getty Images)

It is one of the largest, most profitable companies in the world, with billions of users, but more and more questions are being asked of Facebook. Accused of allowing the spread of fake news and hate speech, and of turning a blind eye to election meddling by Russia, Facebook is in the spotlight for the wrong reasons. Facebook’s founder and CEO, Mark Zuckerberg has committed himself to “fixing Facebook.” With the help of experts in the field, in the US, India and Germany, we ask if Facebook really is in trouble.Presenter: Helena Merriman Producers: John Murphy and Josephine Casserly(Photo: Indian demonstrators protest against Facebook's Free Basics initiative in Bangalore on 2 January, 2016. Credit: Manjunath Kiran/Getty Images)

The US and UK governments have accused Russia of orchestrating the most damaging cyber-attack in history. It caused billions of dollars’ worth of damage in over 60 countries. This programme tells the story of the attack as it unfolded across the globe. With the help of the world’s leading cyber security experts we take a forensic look at how the attack began, the extraordinary way in which it spread, and examine the international repercussions.(A laptop displays a message after being infected by a ransomware as part of a worldwide cyberattack. Photo Credit: Rob Engelaar/Getty Images)

Women earn less than men in every country in the world. Women are now more educated than ever before. But, on average, they don't take home the same in their pay packets. And laws against discrimination in the workplace haven't been enough to close the gap. This inequality in wages has proven difficult to shift. Governments, employers and unions are struggling to find solutions to this stubborn and deep-rooted problem. How do you close the gender pay gap? Presenter: Krupa Padhy Producers: Josephine Casserly and Nicola Kelly(image: Women from Dawson Street Child Care take part in a protest march as part of a campaign for equal pay in Melbourne, Australia. Credit: Scott Barbour/Getty Images)

It is feared than in a few months’ time Cape Town could run out of water. The city is planning for so-called Day Zero when the supply is switched off and people will have to collect water rations. Cape Town is an extreme example of what is now a global phenomenon of water scarcity. We investigate how the city got so close to the brink, and whether there’s anything that other cities around the world can do to avoid a similar fate.(image: A man collects drinking water from taps that are fed by a spring in Newlands,Cape Town at the foot of Table Mountain. Photo credit: Rodger Bosch/Getty Images.)

The Taliban have staged devastating attacks in the capital of Afghanistan, Kabul, in recent weeks. And a BBC study has discovered the group is active across the majority of the country – pushing beyond its traditional southern stronghold into eastern, western and northern parts. Seventeen years after the Taliban were toppled by a US-led invasion, it is clear the insurgent group has not been defeated. Why are the Taliban so resilient?Presenter: Helena Merriman Producers: Ruth Alexander and Josephine Casserly

The story of how the search for a material to replace ivory changed our lives forever. In the 19th century a billiard ball company placed an advert in a newspaper offering $10,000 to anyone who could come up with a substitute for ivory. There was growing concern that companies were hunting elephants into extinction so they could use their ivory for billiard balls, buttons and umbrella handles. The story that follows takes us from explosive factories that often went up in smoke to the modern world we find ourselves in today. How did plastics go from being a saviour of the environment to a cause for concern? How did we get hooked on plastic? Presenter: Helena Merriman Producer: Phoebe KeanePhoto: A man checks used plastic bottles for recycling at a recycling station in Agartala Credit: ARINDAM DEY/AFP/Getty Images

China has long been keen to assert its authority in the South China Sea. In recent years, it has undertaken a huge programme of island-building to stake its claim to the region. Fiery Cross, once a tiny reef, is now a fortified airbase. And this is just one of China’s seven artificial islands in the Sea.But China is not the only one. Bordered by seven states, many others also claim parts of the South China Sea as their own. Experts warn these hotly contested waters could be a flashpoint for conflict in 2018.Why is the South China Sea so important to China? (Photo: Fiery Cross. Credit: CSIS Asia Maritime Transparency Initiative/DigitalGlobe)

The EU’s launched the ‘nuclear option’ against Poland, the first time it’s triggered the disciplinary measure in its history. They say recent changes to the legal system mean there is a serious threat to the rule of law and as a punishment, Poland could lose its voting rights in the European Union. The ruling party say this is an attack on Poland and that the EU should not be telling them what to do. The government says that actually their judiciary is threatened by the legacy of communism which is why they have made the legal reforms. They also say they’re being singled out by the EU for their refusal to take refugees, which they claim pose a threat to their country. If you believe the government, there are lots of threats to Poland, but what is actually being threatened and is there something far greater at stake? What is the greatest threat to Poland?Presenter: Ruth Alexander Producer: Phoebe Keane(Photo: Right-wing nationalist protesters burn the European Union flag in 2015. Credit: Natalia Dobryszycka/A

In 2017 the black flag of the Islamic State group flew in the southern Philippines as a mixture of local and foreign fighters attacked the Islamic City of Marawi. While the government did eventually regain control, it took five months to break the siege and many terrorist leaders escaped during the fighting. It's led to fears that the extremist violence could spread. In this Inquiry we investigate the long history of conflict which provided a fertile place for IS's Islamist ideas to grow, and ask how important the region is to IS now that they're retreating in the Middle East.(Image: Destroyed buildings in what was the main combat area in Marawi. Photo: Merlyn Manos/Getty Images)