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We investigate a nutritional conundrum –can chocolate ever be better for you than salad? Today we dive in to one of our listener’s family debates and try to find an answer, with the help of nutrition experts Dr David Katz and Professor Bernadette Moore.

Reporter: Paul Connolly

(Picture: A pyramid made of chocolate and salad

How many young people are unemployed? How much debt does the government owe? How many people have died from Covid? These are questions that many governments will keep regularly updated. But in China they have disappeared. We investigate the reasons behind China’s missing numbers.

Reporter: Celia Hatton

(Picture: Chinese flag behind a graph with statistics

Exercise is good for you in all kinds of ways, there is no medicine like it to prevent a whole range of illnesses. But for some endurance athletes, exercise also comes with increased risk of a heart condition called atrial fibrillation.

We look for the right way to think about the risks around exercise.

Reporter: Paul Connolly

(Picture: A cyclist training in the mountains

Former Vice President Al Gore has said that climate change is predicted to lead to a billion climate refugees. But where do these predictions come from and are they realistic? We investigate the idea that floods, droughts, storms and sea level rise will cause a mass migration of people across borders.

Reporter and Producer: Tom Colls

(Photo: Floods in central Somalia

Veronica Carlin is a data scientist who loves romantic comedies. But she had a hunch about those movies, that there aren’t many women like her, women in STEM - science, technology, engineering and maths – taking the lead roles. So she set out on a maths quest to find out what’s what.

Presenter: Kate Lamble

(Picture: A young couple with a heart-shaped balloon on the street

We check out suspect stats on boozing Brits and fishy figures on fishing fleets in the South China Sea.

With the help of Professor John Holmes from the University of Sheffield's School of Medicine and Population Health and Simon Funge-Smith, a senior fishery officer at the FAO.

Presenter and producer: Charlotte McDonald

Are we alone in the universe – and if not, how many other civilisations might there be? Remarkable images and data sent back to Earth by the James Webb telescope have given a new impetus to a well-worn debate. We ask how far mathematics – and in particular a famous equation called the Drake Equation – can be used to answer one of the most fundamental questions we face. Paul Connolly investigates with the help of Catherine Heymans, Astronomer Royal for Scotland and Professor at the University of Edinburgh and Bill Diamond, President and CEO of the SETI Institute in California.

Presenter: Paul Connolly

(Image: : A cluster of young stars, surrounded by clouds of interstellar gas and dust, in a nebula, located in the constellation Carina. Credit: Reuters)

The cultural importance of gold in India as a symbol of wealth, prosperity and safety is well known – but how much do Indians actually own? Reporter Perisha Kudhail looks at a widely circulated claim about Indian women owning 11% of the world’s gold, with the help of Delhi based journalist Mridu Bhandari and Joshua Saul, CEO of the Pure Gold Company.

(Image: A saleswoman shows gold bangles to a customer at a jewellery showroom in Kolkata. Credit: Reuters/Rupak De Chowdhuri/File Photo)

Conventional histories of mathematics are dominated by well-known names like Pythagoras, Leibniz or Newton. But to concentrate solely on figures from Europe gives us only a patchwork understanding of the rich and varied history of mathematical achievement around the world. Tim Harford speaks to Dr Kate Kitagawa, co-author of ‘The Secret Lives of Numbers’ to explore the long history of mathematical advances and innovation across civilisations and centuries, from the female mathematician at court in imperial China to the pioneers in the mathematical powerhouses of the Middle East in the first millennium AD.

Presenter: Tim Harford

(Picture: Statue of Al Khwarizmi, a ninth century mathematician

Do you notice fewer insect splats on windscreens than you used to? There’s a study in the UK trying to measure this ‘windscreen phenomenon’, as it’s become known. We hear more about the study and whether we can draw conclusions about insect numbers in general, from reporter Perisha Kudhail, Dr Lawrence Ball from the Kent Wildlife Trust and Professor Lynn Dicks from the University of Cambridge.

Presenter: Ben Carter

(Photo: Dead insects on a windshield