An interruption to your regular podcast feed: the first episode of a new BBC Radio 4 series investigating the steep rise in autism diagnoses.

The Autism Curve looks into the data that has prompted arguments - and conspiracy theories - about what’s behind the rapid rise. It goes on to explore changes in what autism is, who gets to define it, and whose experience counts.

In this first episode, Ginny Russell discusses her 20-year study that showed an astonishing eightfold rise in new autism diagnoses in the UK on an exponential curve. And Professor Joshua Stott explains how a surprising discovery at a dementia clinic led him to calculate that that enormous rise in diagnoses may still undercount the country’s autistic population by as much as 1.2 million.

Listen to the rest of The Autism Curve here: https://www.bbc.co.uk/sounds/play/m002bszl

Archive: BBC; CSPAN; Fox News; CNN.

Presenter: Michael Blastland

On the 29th April US President Donald Trump took to the stage in Michigan to celebrate his first 100 days in office.

This is a milestone in American politics, but is everything he claims the administration has achieved true?

The BBC’s US National Digital Reporter Mike Wendling joins us to fact-check President Trump’s claims on immigration, the stock market, fentanyl and….eggs.

Presenter: Lizzy McNeill

Netflix’s psychological drama Adolescence has started a debate about teenage boys and misogyny in modern society. It tells the story of a seemingly normal young boy, Jamie, who is arrested after the brutal murder of a girl in his class.

The series focuses on how young men are being radicalised against women by various podcasts, blogs and forums that make up the anti-feminist movement, the so-called ‘manosphere’. These podcasts often give men tips about how to be an ‘alpha’ male and promote the idea that feminism has set back men's rights. They use a range of material to back up their claims, including statistics.

Here are More or Less we’ll all about the facts. Every day we use a toolkit of known proofs to try and answer our listeners’ questions. But who do we have to thank for this toolkit and how did they set about proving the unknown?

What is the cash value of a human life?

That’s the question at the heart of The Price of Life, a book by journalist Jenny Kleeman.

Presenter: Tim Harford

What is the error in the calculation Donald Trump used to work out his new tariffs?

What happened when the government ordered a recount of bobbies on the beat?

When is a tax freeze not a tax freeze?

And do redheads really have a 25% higher tolerance to pain?

Tim Harford investigates some of the numbers in the news.

This episode was originally broadcast on the 9th April.

Presenter: Tim Harford

US President Donald Trump has announced sweeping tariffs on global trade, adding taxes of as much as 50% to imports from some countries.

The tariffs, he says, are “reciprocal” – calculated to address currency manipulation and trade barriers that other countries place on the US.

However, when you look at how the new tariffs were actually calculated, that claim does not add up.

Tim Harford speaks to Thomas Sampson, an associate professor at the London School of Economics, to understand what is going on.

Presenter: Tim Harford

Donald Trump is raising tariffs on Canada, but has his northern neighbour done anything to deserve them?

In her Spring Statement, Chancellor Rachel Reeves announced that the UK’s fiscal “headroom” was, again, £9.9bn. We explore this curious coincidence.

Is it true that one in four people in the UK is disabled? And what does that mean for the state of our workforce?

Tim Harford investigates some of the numbers in the news.

Presenter: Tim Harford

Neighbours, everybody needs good neighbours, and since the end of the Second World War that’s exactly what the US and Canada have been. They’ve enjoyed free trade agreements, close knit economic ties - and not so friendly ice hockey matches.

Some Labour politicians have been calling for a wealth tax, claiming a 2% tax could raise £24bn. Where are the numbers from and do they add up?

A listener asked why housing in the UK is the oldest in Europe. We explain what’s going on.

The Office for National Statistics has changed how it measures the value of pensions and knocked £2 trillion off its estimates of wealth. Not everyone thinks it was a good change. We find out why.

And Lent is here, but how long is the Christian fasting period? We look at the history of a very flexible 40 days.

Tim Harford investigates some of the numbers in the news, and the world around us.

Presenter: Tim Harford