In March 2020, the covid pandemic forced the UK into lockdown. Schools closed, universities went online and the economy shut down.

It slowly became clear that young people were not falling victim to the virus in significant numbers - they made up a fraction of a percent of the overall death toll.

But their lives were radically changed - most spending these formative ages stuck at home as the pandemic raged. Politicians and academics worried about the long term impact this would have on their chances in life.

Five years on, Tim Harford delves into the data to try to work out what we can say with confidence about the effect of the lockdown on the children and young adults who lived through it.

On questions of education levels, job prospects and mental health, what story does the best evidence show us?

Presenter: Tim Harford

You may have seen a map circulated on social media that claims to show the average IQ of different nations.

If you look closely these numbers vary dramatically, with incredibly low scores in developing countries, including many in Africa.

Unsurprisingly the map is often used as a way to bolster arguments about racial or national superiority.

However, when you look at the data behind the claims the whole thing falls apart. We dive into the methods behind the map and ask whether it’s even possible to accurately put a number on intelligence.

It’s been 12 weeks since President Trump announced the formation of DOGE, the so-called department of Government efficiency. We fact-check various claims connected with the drive to route out inefficiency. Listeners asked us to investigate the claim that 1 in 12 Londoners is an illegal immigrant. We look into the claim that imported New Zealand apples have a smaller carbon footprint than British grown apples. Plus - did VAT on private schools really boost the rate of inflation, or was that just a media concoction?

Presenter: Tim Harford

As part of the fast-moving argument over US military support to Ukraine, the US demanded $500bn worth of access to what was variously reported as Ukraine’s rare earths or rare metals or rare minerals. But is there that amount of minerals in the ground?

Presenter: Tim Harford

Has the US really sent Ukraine $350 billion for its war effort? Is a $500billion cut of Ukraine’s rare earth minerals a good deal? How will the UK fund the governments ambitions to raise defence spending to 3%? But most important of all - how many muscles are in an elephant’s trunk?

Presenter: Tim Harford

As negotiations to end the Ukraine war rumble on, Donald Trump seems equally interested in talking about the past, repeatedly claiming that the US has given much more aid to Ukraine than Europe has, and that Europe’s aid took the form of a loan that they’ll be getting back.

Emmanuel Macron has publicly contradicted the US President - so who’s correct?

Nathan Gower speaks to Taro Nishikawa, project lead at the Kiel Institute’s Ukraine Support Tracker to get the true picture.

Presenter / Producer: Nathan Gower

Last week Elon Musk revealed that he had been through the Social Security Agencies database and found millions of people aged over 100.

The vast majority of these people are dead, but their accounts and social security numbers remain live.

Elon claimed that he had uncovered ‘the biggest fraud ever’ prompting some news outlets to speculate that billions of dollars might be being paid to these dead people every month.

But is it true? We look at whether this is new information and what the data actually tells us.

Produced and presented by: Lizzy McNeill

On the 25th January, the US Press Secretary announced that in their bid to stop ‘fraud’ and waste DOGE had cancelled $50 million worth of condoms being sent to Gaza by the United States Agency for International Development (aka USAID).

President Trump later repeated this claim, adding on that Hamas were using said condoms to make bombs to fire at Israel.

On the 7th of February the USAID website was taken down.

We fact check this claim and find out how much of the US budget was spent on USAID programmes.

Presenter: Charlotte McDonald

Babies born in the US to Black Hispanic or African American mothers are more likely to die than any other ethnic group in America.

That is a fact.

But the reason why this happens is unclear. In 2020 a study came out that claimed that black babies attended by white doctors after birth were twice as likely to die than white babies attended by white doctors.

People jumped to the conclusion that the race of the doctor was leading to the different outcomes. But when you delve into the numbers, a very different picture starts to emerge.

Presenter: Lizzy McNeill

Google claim their latest quantum computer chip is able to process something in five minutes it would take a normal computer 10 septillion years to figure out.

As this is a massive amount longer than the entire history of the known universe, that seems to suggest the chip is extremely powerful.

But when you understand what’s going on, the claim doesn’t seem quite so impressive. Dr Peter Leek, a quantum computer scientist from Oxford University, explains the key context.

Presenter: Charlotte McDonald