Just before this BBC podcast gets underway, here's something you may not know.

My name's Linda Davies and I Commission Podcasts for BBC Sounds.

As you'd expect, at the BBC we make podcasts of the very highest quality featuring the most knowledgeable experts and genuinely engaging voices.

What you may not know is that the BBC makes podcasts about all kinds of things like pop stars,

poltergeist, cricket, and conspiracy theories and that's just a few examples.

If you'd like to discover something a little bit unexpected, find your next podcast over at BBC Sounds.

Thanks for downloading the more or less podcast from BBC Radio 4.

Here's Tim Harford.

Hello and welcome to more or less.

Whether you love numbers or just want to be friends with them,

we're the programme for you.

And as always we'll be turning to the numbers

for insights about the news and more importantly the world.

Later we'll ask whether zero tolerance policing really works.

We call it Newton's law of crime.

What goes up must come down and what goes up the most tends to come down the most.

And we'll ask whether it's possible to predict the future height of growing children.

The best predictor of what height an individual is going to be is the height they are in childhood.

But first let's talk about the most delicious condiment in existence, Salt.

Last month a Daily Express headline declared,

Now Salt is safe to eat.

And that sentiment was echoed in the, I think it's fair to say, more academically

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