India’s caste system, one of the world’s oldest social hierarchies, has shaped lives for centuries, granting privileges to some while oppressing others. Although caste based discrimination was banned in 1948, its influence hasn’t gone away and is now spilling into our social media feeds, with some young women asserting pride in their caste identities.

We’re joined by correspondents from Delhi, Umang Poddar and Divya Arya, who explain the complexities of caste and unravel this new trend on Instagram.

We also hear from two Indians, Sachin and Christina, who come from different ends of the system. Their insights help us explore the ongoing impact of caste in India today.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Baldeep Chahal & Hayley Clarke Editor: Verity Wilde

The death of One Direction star Liam Payne has shocked the world, and there’s been a huge outpouring of grief. Many details about the British singer's death still remain unclear, but information from emergency services and other authorities has started to build a picture of the events. We know that he was in Buenos Aires, in Argentina, and died after falling from a hotel balcony.

Liam rose to fame after competing in the singing competition the X Factor. It was here that he first met fellow One Direction members Harry Styles, Louis Tomlinson, Niall Horan and Zayn Malik. Entertainment reporter Bonnie McLaren reminds us of his journey to fame, and his solo projects.

We also hear why he meant so much to fans globally, including 22-year-old Bintelmran in Pakistan. Plus Joshua Miles, a psychotherapist based in London, talks us through why we grieve celebs, even if we don’t know them directly.

If you’ve been affected by any of the issues in this episode please contact support organisations in your own country. Or, if you live in the UK, please check out bbc.co.uk/actionline.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Mora Morrison and Benita Barden Editor: Verity Wilde

We’re bringing you an extra episode of What in the World.

Israeli troops have killed Hamas leader Yahya Sinwar in Gaza. He is described as the mastermind of the 7th October 2023 attacks and Israel’s most wanted man.

We explain who Yahya Sinwar was and how he was killed and what the Israelis have said about him. Shaina Oppenheimer from BBC Monitoring goes through some of the reaction to his death, including from Palestinians and Arab social media.

And with the help of the BBC’s International Editor, Jeremy Bowen, we get answers to the big questions like what does this mean for the hostages taken on 7th October and the possibility of a ceasefire? Does this mean the war in Gaza will come to an end? And what will happen to Hamas, which is designated as a terrorist organisation by the US, UK and European Union?

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 0330 12 33 22 6 Presenter: William Lee Adams Producers: Julia Ross-Roy and Kevyah Cardoso Editor: Verity Wilde

Tensions between Israel and the United Nations over its peacekeeping operations in southern Lebanon have escalated in recent weeks. UN peacekeepers say Israeli forces fired at one of their positions and that tanks forced entry into another of its compounds, injuring 15 peacekeepers. Israel says that Unifil (United Nations Interim Force in Lebanon) has failed to prevent Hezbollah establishing itself in southern Lebanon, which is one of its main responsibilities, and has ordered Unifil to leave. Hezbollah is designated as a terrorist organisation by the US, European Union, Israel and Gulf Arab states.

BBC Middle East correspondents Hugo Bachega and Wyre Davis, in Beirut and Jerusalem respectively, explain what exactly has been happening in Lebanon and the history of the row between Israel and the United Nations.

We also hear from Major Shubham Thuwal, a UN peacekeeper from India who is stationed in Lebanon, to learn about what a peacekeeper actually does.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Julia Ross-Roy, Maria Clara Montoya and Adam Chowdhury Editor: Verity Wilde

It’s less than three weeks until the US election where voters will decide who they want their next president to be: either Kamala Harris or Donald Trump. Overall, voters under 35 will make up about a third of the electorate, so the youth vote is an important one. But which issues matter most to them?

BBC reporter Nathalie Jimenez in New York explains why the economy is at the front of everyone’s minds. And The Climate Question’s Jordan Dunbar, who’s just back from a road trip across the US swing state of Georgia, shares what matters to voters there.

Credit: Clips of Kamala Harris and Donald Trump come from the White House (May 10, 2023 President’s Advisory Commission on Advancing Educational Equity, Excellence, and Economic Opportunity for Hispanics), and ABC News Presidential Debate (2024).

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Mora Morrison and Benita Barden Editor: Verity Wilde

On Monday after Hurricane Milton forced a delayed launch, a spacecraft that will hunt for signs of alien life on one of Jupiter’s icy moons blasted off from Cape Canaveral, Florida.

Europa Clipper will now travel 1.8 billion miles to reach Europa, a deeply mysterious ice moon orbiting Jupiter. It won’t arrive until 2030 but what it finds could change what we know about life in our solar system.

BBC Climate and Science reporter Georgina Rannard details the ambitious mission and Dr Sara Seager, Professor of Planetary Science and Physics at MIT, explains how we can detect signs of life beyond earth.

We also hear from Britney Schmidt, a professor of Earth and Atmospheric Sciences, who played a pivotal role in designing an ice-penetrating laser for the space mission. Plus, Planetary Microbiologist Mark Fox-Powell, shares the profound implications of potentially discovering life beyond our planet.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: Kevyah Cardoso and Baldeep Chahal Editor: Verity Wilde

For decades, Ghana has been Africa's leading producer of gold. Most of its mining takes place legally. But small-scale, illegal gold mining — known locally as “galamsey” — has become a major problem.

Toxic chemicals from the process are polluting Ghana’s water - 60% of its waterways are now contaminated. But as the country’s economy struggles, many involved in the practice say they lack an alternative to get by.

BBC Reporter Favour Nunoo in Accra explains how illegal mining is impacting the environment and people’s well-being. We also hear from two protestors who recently took to the streets demanding government action ahead of elections in December.

And Jewel Kiriungi, a BBC Business reporter in Nairobi, explains where gold produced in Ghana actually ends up.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: William Lee Adams, Emily Horler and Benita Barden Editor: Verity Wilde

2024 is a huge year for elections, with more than 60 countries holding national elections and over half the world’s population voting. With each election it can seem like opinion polls dominate the coverage but how are these polls carried out? We speak to pollster and data analyst David Byler from the American non-partisan polling company Noble Predictive Insights about how it all works.

We also hear from the BBC’s North America correspondent Anthony Zurcher, who explains how significant the polls are in the 2024 US Presidential election between Kamala Harris and Donald Trump.

Historically there have been lots of poll prediction fails. BBC journalist Rupsha Mukherjee in Delhi tells us about how some important polls got it wrong in India’s general election this year. And Niko Kelbakiani, a journalist at BBC Monitoring, explains the role opinion polls play in Iran’s elections - where the Guardian Council must approve every candidate.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Julia Ross-Roy, Benita Barden and Hayley Clarke Editor: Verity Wilde

HPV (human papillomavirus) is a sexually transmitted disease that can cause genital warts but often doesn’t have any symptoms. It’s the leading cause of cervical cancer. The HPV vaccine is available for teenage girls in over 125 countries, but only one in eight girls have had it.

Dorcas Wangira, the BBC’s Africa Health correspondent joins us to discuss the HPV vaccine and how some countries have used the vaccine to reduce their rates of cervical cancer.

Malawi has one of the highest rates of cervical cancer in the world, after Eswatini and Zambia. BBC reporter Ashley Lime, in Kenya, explains why - and tells us how Malawi is trying to improve cervical cancer treatment by installing new radiotherapy machines.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: Mora Morrison, Hayley Clarke and Julia Ross-Roy Editor: Verity Wilde

In September, Rwanda detected its first ever outbreak of the highly infectious Marburg virus. Since then there have been more than forty confirmed cases and at least twelve people have died. Its health ministry has received 700 doses of an experimental drug supplied by the US-based Sabin Vaccine Institute, but we don’t yet know if it’ll be effective.

BBC’s Africa Health reporter Makuochi Okafor, explains how Rwanda is managing the outbreak and some of the challenges the country faces.

Across the border in neighbouring Democratic Republic of Congo (DRC), another vaccination programme is underway for Mpox. Nearly 5,000 cases of Mpox have been detected in the DRC, but its vaccine rollout has been fraught with logistical challenges due to the country’s size. Emery Makumeno, a BBC journalist in the DRC’s capital, Kinshasa, discusses some of the hurdles officials face.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: William Lee Adams and Benita Barden Editor: Verity Wilde

This week, the BBC’s Green Sport Awards celebrated athletes from around the world who are using their sporting profile to make change towards a more sustainable future. We hear from BBC Sport journalist Nicola Pearson who tells us about the awards and who won.

We also speak to Maddy Orr, an author and assistant professor at Toronto University in Canada, who specialises in the connection between sport and climate change. She explains how climate change is affecting sport and what sports fans can do to reduce their environmental footprint.

Olympic shooter Kishmala Talat from Pakistan and Paralympic swimmer Malak Abdelshafi from Egypt tell us how they try to help the environment in their sports. Plus, young athlete and activist Innes FitzGerald tells us why she chose to turn down racing in Australia, and the difficult decision to fly to Peru to compete this year.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: Hannah Gelbart Producers: Emily Horler, María Clara Montoya, Adam Chowdhury and Hayley Clarke Editor: Verity Wilde

One year ago, Palestinian militant group Hamas launched an cross-border attack on Israel. It was the deadliest day in Israel’s history: Around 1,200 people were killed, and another 250 people were taken as hostages. Israel began a massive campaign of air strikes on Gaza, which has killed 41,000 people according to the Hamas-run health ministry. Tensions have escalated across this region, with Israel launching a military campaign in Lebanon.

BBC’s Shaina Oppenheimer in Jerusalem explains how life has changed for Israelis, the impact of the attacks on the 7th October and the ongoing hostage crisis.

Israel does not allow the BBC - or other international media - to report independently from inside Gaza. We speak to Kristina Völk, a BBC journalist in London, who has been speaking to Palestinians in Gaza for over a year. She tells us their account of how life has changed in Gaza.

Instagram: @bbcwhatintheworld WhatsApp: +44 0330 12 33 22 6 Email: [email protected] Presenter: William Lee Adams Producers: Emily Horler, Mora Morrison and Benita Barden Editor: Verity Wilde