Focus on Africa - Ethiopia hunger: More than 200 starve to death in Tigray

More than 200 people have starved to death since July in Ethiopia's drought-hit and war-scarred Tigray region, local authorities say. Officials warn the region is on the brink of famine on a scale last seen in 1984. How did Tigray return to this desperate situation?

Also why are Nigerians turning to crowdfunding to pay for ransoms?

And what does it mean to be Black, African and British? How African migration is shaping politics, faith, business and culture in the UK.

Good Bad Billionaire - El Chapo: Cocaine kingpin

The story of Mexican drug lord Joaquín Archivaldo Guzmán Loera, better known as El Chapo, the leader of one of the world’s most prolific, violent and powerful drug cartels.

BBC business editor Simon Jack and journalist Zing Tsjeng follow El Chapo from childhood in the Mexican mountain region of Sinaloa to the very top of the drug business, and into the New York prison cell where he now resides.

Simon and Zing reveal how El Chapo innovated with tunnels along the US-Mexican border, escaped prison twice, and used extreme violence to gain power. Then they are given the simple task of deciding if he's good, bad, or just another billionaire.

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Focus on Africa - Why has Burundi closed its border with Rwanda?

Burundi has closed its borders with Rwanda after accusing its neighbour of funding rebel attacks. Rwandan President Paul Kagame denies the charge, but Burundi's government has branded him a "bad neighbour". Can the two neigbours overcome their differences?

Also a report on migrant workers facing forced labour and exploitation in Mauritius

And a doctor from Sierra Leone tells us how his country and developing countries can hold onto their health care workers.

CrowdScience - Can planting trees solve the climate crisis?

Our question this week comes from a father and his two young boys. They want to know whether it’s possible to plant enough trees to soak up all the extra carbon we are putting into the atmosphere? The quest to find answers takes us to a remote reforestation project in the Carpathian Mountains in Romania which could be a model for other projects looking to tackle the climate crisis through reforestation. We speak to experts to find out how much tree planting and reforestation can do in helping combat the climate crisis. Presenter: Caroline Steel Producer: Margaret Sessa-Hawkins Editor: Richard Collings

Science In Action - Seeking supernovas

The James Webb Space Telescope has revealed the clearest ever view of the stunning Cassiopeia A supernova, complete with a weird feature called 'the green monster'. Professor Dan Milisavljevic, an astronomer at Purdue University, tells us all about his research into this space-based beauty.

Professor Tamara Davis from the University of Queensland has been turning her eye to far more distant supernovas, and explains how they have given us new insight into the Universe's expansion.

Moving on to human history, William Barrie from the University of Cambridge tells us about a new study that explores the reason for high levels of multiple sclerosis in northern Europe.

And going further back in time, researcher Ethan Mooney has studied a sample of fossilised skin, which may be the oldest ever discovered.

Presenter: Roland Pease Producer: Alice Lipscombe-Southwell Editor: Martin Smith Production co-ordinator: Jana Bennett-Holesworth

(Photo: Cassiopeia A Supernova. Credit: Nasa, ESA, CSA, STScI, Danny Milisavljevic, Purdue University, Ilse De Looze, UGent, Tea Temim, Princeton University)

Focus on Africa - Comoros’ president bids for a fourth term in forthcoming election

Voters in Comoros head to the polls on Sunday to elect the next president. The incumbent Azali Assoumani is seeking a fourth term, but who are his main challengers?

The African Cup of Nations (AFCON) kicks off in the Ivorian capital, Abidjan, this Sunday, but next time hosts Kenya did not qualify for this year’s tournament. Former Kenyan international Musa Otieno says the game’s infrastructure in the country needs to improve.

And Knives down, Gloves up, we hear from a young man with Ivorian and Guinean heritage, on the connection between good mental health and sport and why he established a boxing club after a lifechanging act of violence.

Unexpected Elements - Super corals and science diplomacy

Could geopolitical tensions around the Red Sea affect research into the region’s heat-resistant super corals? Also on the program, what an ocean that used to lie under the Himalayas can tell us about evolution, the fruit chat continues with the latest chapter in the bananadine saga, and how looking to the past could help create the shipping of the future.

Focus on Africa - Why is South Africa taking Israel to the International Court of Justice?

South Africa is taking Israel to the ICJ in the Hague. Pretoria alleges that genocide is being committed against Palestinians during the Gaza conflict. So far more than 23,000 Palestinians have been killed in Israel's operation against Hamas militants.

Are Ethiopians in Somalia and Somaliland now living in fear as tensions rise between Mogadishu and Hargeisa after a seaport access deal ?

And the future of Artificial Intelligence in Africa.