Focus on Africa - Why Malawi seeks billions in unpaid taxes

Malawi's government is demanding billions in unpaid taxes and royalties from a US-based gemstone company for rubies exported over the last 10 years. The companies deny the claims

The tale of the child bride social media sensation in South Sudan.

And a couple share their painful experience with infertility

Presenter Audrey Brown Producers: Susan Gachuhi and Charles Gitonga in Nairobi. Stefania Okereke, Yvette Twagiramariya and Amie Liebowitz in London. Senior Producer: Paul Bakibinga Technical Producer: Jonny Hall Editors: Andre Lombard and Alice Muthengi.

CrowdScience - Will the Earth ever lose its Moon?

The Moon has always sparked human curiosity. It governs the tides and biological rhythms. It’s inspired myths and stories. It’s inspired us to reach out and explore it. And it's certainly inspired CrowdScience listeners, who have sent us a host of questions about it. And in a special lunar-themed episode we’ve brought together a panel of astronomers and planetary scientists to help answer them.

What would life be like if there was no Moon? Would there even be life? Or what if we had two moons? Are the Moon and Earth equally battered by meteors? What would happen if an asteroid collided with the Moon? And could the Moon ever escape Earth’s gravity?

Anand Jagatia is joined by Prof Sara Russell, Head of the Planetary Materials Group at the Natural History Museum in London; Prof Neil Comins from the University of Maine, author of the book What if the Moon didn’t Exist?; and Prof Katarina Miljkovic from Curtin University in Perth, Australia.

Presenter: Anand Jagatia Producer: Jeremy Grange Editor: Cathy Edwards Production Co-ordinator: Ishmael Soriano Studio Manager: Andrew Garratt

(Photo: Landscape with the rising of the full moon during the golden hour Credit: Jose A. Bernat Bacete via Getty Images)

Focus on Africa - Why is piracy on Somalia waters increasing?

Piracy off the coast in Somalia, had cost the global economy around 7 billion US dollars just over a decade ago. Since then, international security patrols in the Gulf of Aden and Indian Ocean shipping lane all but eliminated piracy. But in recent months, there’s been a resurgence off the coast of the autonomous region of Puntland. Why is that?

Also, what's behind the fire at the parliamentary buildings in Liberia?

And why Nigerians are not all that happy about "Detty December"?

Presenter: Charles Gitonga Producers: Bella Hassan and Rob Wilson in London. Todah Opeyemi in Lagos. Technical Producer: Francesca Dunne Senior Journalist: Karnie Sharp Editors: Alice Muthengi and Andre Lombard

Unexpected Elements - The science of Santa

As news breaks that archaeologists have found the tomb of St Nick in Turkey, we check in on the North Pole Father Christmas, and fact-check his present giving schedule with advanced level physics and a Gant chart.

Plus, prepare for stories of reindeers high... despite their apparent immunity to their favourite hallucinogenic mushroom treats. And we burrow into Santa’s iconic beard to find any microbial magic that lives there.

And yet more reindeer magic, this time the mysteries of their amazing body clocks, which they seem to be able to switch on and off at will... AND we reveal Rudolf the red nose reindeer’s big secret. You’ll never hear that song in the same way again

Presenter: Marnie Chesterton, with Phillys Mwatee and Camilla Mota Producers: Emily Knight, Alice Lipscombe-Southwell and William Hornbrook Sound engineer: Searle Whittney

Science In Action - Sun Grazing

New insights into how our skin learns to tolerate and co-exist with bacteria on its surface show great potential for the development of simpler and less invasive vaccines. Stanford University’s Djenet Bousbaine has published two papers in Nature detailing the microbiological research and mouse vaccination experiments that could change the future of immunisation. The Sun is the hardest place in the Solar System to reach. But by the time the next edition of Science in Action is on air, NASA’s Parker Solar Probe will have swooped through the scorching corona layer of the Sun, re-emerged, and be readying itself to relay the details of magnetic fields and particle storms to the team. NASA Helioscience deputy manager, Nicky Rayl, reveals all about the mission and explains why the Parker Probe’s future looks bright. And a trip half a billion years back - and then some - to the dawn of complex life here on Earth. Microfossil hunter Shuhai Xiao, from Virginia Polytechnic Institute and State University, has been compiling a single statistical database to better understand evolution during the so-called ‘boring billion’, why subsequent changes on the planet triggered a new diversity of species to emerge, and how the interplay between biology and geology has paved the way for modern life as we know it.

Presenter: Roland Pease Producer: Alex Mansfield Assistant Producer: William Hornbrook Production Coordinator: Jana Bennett-Holesworth

(Image: Solar Activity Captured in H-Alpha Filter. Credit: Manuel Romano/NurPhoto via Getty Images.)

Focus on Africa - Are Kenyan police managing the Haiti crisis?

An underfunded and undermanned contingent of 400 Kenyan police are on a mission to quell gangs in Haiti. How are they coping?

More Somali migrants stranded in Libya return home.

And Algerian Kamel Daoud was recently awarded a top French prize for his novel Houris- why is it banned in Algeria?

Presenter: Charles Gitonga Producers: Amie Liebowitz in London and Susan Gachuhi in Nairobi Senior Producer: Paul Bakibinga Technical producer: Jonathan Greer Editors: Andre Lombard and Alice Muthengi.

Focus on Africa - Mass deportation of Sierra Leoneans from Guinea

Over a thousand Sierra Leoneans were recently arrested on the streets of Conakry in Guinea and deported. Sierra Leoneans reciprocated with their own deportation of Guineans. This all resulted in a diplomatic spat between the two countries. We'll get the details.

Also is Kenya really increasing state surveillance of its citizens? We'll hear government response to these claims

And a fresh start for Mali as production begins at the largest non-exploited lithium mine in the world!

Presenter: Charles Gitonga Producers: Frenny Jowi and Susan Gachuhi in Nairobi and Bella Hassan and Rob Wilson in London Technical Producer: Francesca Dunne Senior Journalist: Karnie Sharp Editors: Andre Lombard and Alice Muthengi

Focus on Africa - Why are drowning rates worrying Uganda?

The World Health Organization recently published its first-ever report on drowning prevention. The rates are highest in Africa-with Uganda one of the highest

And a Ghanaian shares his close encounter with jihadists in Burkina Faso

Are there academies in Nigeria where people are taught online scamming?

Presenter : Charles Gitonga Producers: Susan Gachuhi in Nairobi, Blessing Aderogba in Lagos and Amie Liebowitz in London. Senior producer: Paul Bakibinga Technical Producer Philip Bull Editors: Andre Lombard and Alice Muthengi

Focus on Africa - The impact of Cyclone Chido on Mayotte

Residents of Mayotte have spoken of "apocalyptic scenes" caused by the worst storm in 90 years to hit the French Indian Ocean territory. Twenty people have been confirmed dead, but local authorities say that number could rise into thousands. We'll look at the impact.

Also a look at the painful legacy of landmines in Africa and why campaigns to end their use is always welcome

And the life and times of a political cartoonist. We'll hear from South Africa's Zapiro and Kenya's Maddo!

Presenter: Charles Gitonga Producers: Yvette Twagiramariya, Bella Hassan and Stefania Okereke Technical Producer: Phillip Bull Senior Journalist: Karnie Sharp Editors: Andre Lombard and Alice Muthengi