More or Less

A recent scientific review claims the weed killer glyphosate raises the risk of developing the cancer non-Hodgkin lymphoma by 41 percent. But deciding what causes cancer can be complicated and there are lots of people and organisations on different sides arguing for against this. So in this edition of More or Less, we look at the disagreements and how the authors of the review came up with the results. With cancer epidemiologist Dr Geoffrey Kabat, Toxicologist Dr Luoping Zhang and statistician Sir David Spiegelhalter. Producer: Darin Graham Presenter: Charlotte McDonald Editor: Richard Vadon

Who is the greatest chess player in history? And what does the answer have to do with a story of a chess cheating school from Texas? In this week’s More or Less, the BBC’s numbers programme, David Edmonds finds out what a statistical analysis of chess moves can teach us about this ancient board game.

Presenter: David Edmonds

Image: A Chess Board

Mansa Musa, the 14th century Mali king, has nothing on Jeff Bezos - read one recent news report.

Musa set off on a pilgrimage to Saudi Arabia in the 1300s and it’s said he left with a caravan of 60,000 people. Among them were soldiers, entertainers, merchants and slaves. A train of camels followed, each carrying gold.

In recent reports, he has been described as the richest person that ever lived. He has been compared to some of the wealthiest people alive today.

But how can we know the value of the ‘golden king’s’ wealth and can we compare a monarch to the likes of Amazon founder Bezos? In this edition, historian Dr Emmanuel Ababio Ofosu-Mensah of the University of Ghana in Accra explains who Mansa Musa was and Kerry Dolan of Forbes talks to us about rich lists.

Producer: Darin Graham

(Image: Painting of Mansa Musa, Credit: Getty Images)

Mansa Musa, the 14th century Mali king, has nothing on Jeff Bezos - read one recent news report. Musa set off on a pilgrimage to Saudi Arabia in the 1300s and it’s said he left with a caravan of 60,000 people. Among them were soldiers, entertainers, merchants and slaves. A train of camels followed, each carrying gold. In recent reports, he has been described as the richest person that ever lived. He has been compared to some of the wealthiest people alive today. But how can we know the value of the ‘golden king’s’ wealth and can we compare a monarch to the likes of Amazon founder Bezos? In this edition, historian Dr Emmanuel Ababio Ofosu-Mensah of the University of Ghana in Accra explains who Mansa Musa was and Kerry Dolan of Forbes talks to us about rich lists.

Producer: Darin Graham

(Image: Painting of Mansa Musa, Credit: Getty Images)

Does the sudden loss of an hour of sleep raise the risk of having a heart attack?

Are women really less likely than men to be hired for jobs in tech just because of their sex? A study claims that sexism in the recruitment process is holding women back from entering the tech sector. But the study is not all it seems. There are much better statistics that can help explain why fewer women than men work in tech in the USA and lessons to be learned from India, where there is a much smaller gender gap in the tech sector.

Presenter: Phoebe Keane

Photo: An engineer looking at information on a screen interface

Insects live all around us and if a recent scientific review is anything to go by, then they are on the path to extinction. The analysis found that more than 40 percent of insect species are decreasing and that a decline rate of 2.5 percent a year suggests they could disappear in one hundred years. And as some headlines in February warned of the catastrophic collapse of nature, some More or Less listeners questioned the findings. Is insect life really in trouble?

Presenter: Ruth Alexander

(Image: Hairy hawker dragonfly. Credit: Science Photo Library)

Die, sell on a sunny day, place your work a third of the way through the auction….There are some surprising factors that can affect the price of an art work. Here are six top tips on how to get the best price for your art or, for art buyers, how to make a big return on your investment.

Presenter: Dave Edmonds

Picture Credit: BBC

Tim Harford talks to Matt Parker on how simple maths mistakes can cause big problems.

Tim Harford on climate change, Victorian diseases, maths mistakes and alcohol consumption