Covid related deaths are rising in England and Wales - but what do the figures really tell us? Also the UK's GDP during the pandemic has been revised upwards. Tim Harford and team ask why and discuss what it tells us about the UK's economic performance compared to other countries. Is North Sea gas really four times cleaner than gas from abroad? It's a claim recently made by the government. And we ask whether Chloe Kelly's penalty shot at the World Cup was really faster than the Premier League's fastest goal last season.

Presenter: Tim Harford

On this week’s episode of More or Less we interrogate a widely circulated myth relating to how much of our brain power we can access and engage. Ever heard someone say, “You know we can only use 10% of our brains, right?”. Well, they’re wrong. It’s the stuff of make believe and far-fetched movie plots. Science and evidence based research tells us so - and has, it turns out, been telling us so for decades…politely, if impatiently. So, then, if not 10%…what percentage of our brain do we actually use? From dark matter neurons to super-highway synapse and ghost cells that serve as inert echoes of our evolutionary past - with the help of two leading experts in the field, we crack open the figurative cranium of this debate and rummage around for the definitive truth.

Presenter: Paul Connolly

(Artificial intelligence brain network/Getty)

Can you really buy an electric car for everybody in the UK for the cost of HS2? That claim was recently made on Radio 4's Broadcasting House programme. Also we look at a viral claim that 1 in 73 people who received the Covid vaccine in England was dead by May 2022. Plus we look at the size of the UK's carbon emissions when compared with China and talk about how a recent More or Less maths error pales in comparison to one in the Guardian.

Presenter: Tim Harford

Water used to cool nuclear reactors at the stricken Fukushima nuclear power plant in Japan is being released into the Pacific Ocean by Japanese authorities. The move has sparked protests and concerns about safety in the region and met with retaliation from near neighbour China. But how safe is the water that’s been released? Presenter Charlotte McDonald and reporter Calum Grewar investigate, with the help of Professor Jim Smith of the University of Portsmouth and Professor Gerry Thomas, formerly of Imperial College London and the Chernobyl Tissue Bank.

Presenter: Charlotte McDonald

Butterflies are a much-loved feature of summer in many parts of the world. But how many of them are there on Earth?

That’s the question a young listener to More or Less wanted an answer to – and she couldn’t find the answer no matter how hard she searched the internet.

Presenter Daniel Gordon enlists Professor Jane Hill, a butterfly expert at York University, England, who’s also President of the Royal Entomological Society, to try and help solve the mystery.

He also consults Holly Mynott, International Officer of Butterfly Conservation, who describes the techniques used to run The Big Butterfly Count in the UK – the biggest event of its kind in the world.

Producer/Presenter: Daniel Gordon

Football competitions are kicking off all around Europe in the coming days and weeks, including the world’s most watched division: The English Premier League. We might make our predictions on who we think is going to win a sporting competition but what factors are we considering?

Presenter: Paul Connolly

Image: Premier League Trophy, Credit: Carl Recine/Reuters

Reports on heatwaves across the globe have dominated our newsfeeds over the last few weeks, with temperatures said to have soared over the 40C mark in many parts of Europe. But across social media, not everyone is buying it. A trickle of scepticism swelled to a tidal surge, with people questioning whether temperatures are being hyped up by the wider media to drive fear and scare-monger.

In this programme, we unpick allegations made about how these temperatures are recorded - and if they are accurate. We hear from Samantha Burgess at the Copernicus Climate Change Service; Alessandro Delitala from the Sardinia Environmental Protection Agency; and Sean Buchan from Climate Action Against Disinformation.

Recent global headlines have been dominated by record temperatures across Europe, North America and parts of Asia. As extreme weather events have happened for decades, how are links to climate change made? In this programme we look at how scientists use data to draw climate conclusions and hear how that data isn’t always available, with a focus on severe flooding earlier this year in part of Central Africa. With Joyce Kimutai, principal meteorologist and climate scientist at the Kenya Meteorological Department and researcher at the Grantham Institute for Climate Change, Imperial College.

Presenter: Kate Lamble

Official information on the numbers of dead and injured in the Ukraine war has been in short supply. Little has come from either the Ukrainian or Russian sides, with estimates from western governments and intelligence agencies filling the information void. But some Russian journalists have been documenting war deaths and have come up with a new way of estimating fatalities using probate records. With contributions from David Frenkel, reporter at Mediazona and the BBC’s Russian Service correspondent Olga Ivshina.

Japan has one of the highest rates of life expectancy and one of the lowest birth rates. But does that mean that a widely circulated claim – that more nappies aimed at adults are sold in Japan than those made for babies – is true? With guests Sarah Parsons, Senior Teaching Fellow at SOAS in London and Dr Mireya Solis, Knight Chair in Japan Studies at the Brookings Institution.

Presenter: Charlotte McDonald