You've stopped someone carrying a large amount of drugs.

He's just a teenager.

He's exhausted, scared, not giving you his name, where he's from or where he's going.

He's broken the law.

But maybe he really needs your help.

So how'd you get him talking?

If you think you could be a regular or volunteer police constable, such met careers. Change needs empathy. Change needs you.

This podcast originally aired in 2013. This is the Nature Pastcast, each month raiding Nature's archive and looking at key moments

in science.

In this show, we travel back to the 1940s.

Music Nature, Saturday, July 18th, 1942.

In 1942, it's one of the darkest periods of the Second World War for Britain.

The war with Germany is still ongoing, there's bombing, there's the blitz, great destruction.

My name's John Egar.

I'm a historian of science at University College London,

and I'm fascinated by how science fitted in with the wider world in the 20th century.

Wars in general are very important for science because they call for new weapons, they call for new defences,

and scientists as experts are brought into that process. And in the 20th century, which was a century of global conflict, the scientists were brought into that process like never before. And the

Second World War, I think, is particularly crucial because during the First World War, there were

involved, but many people felt that they weren't used effectively, and there's a determination

in the Second World War to change that, and you can see that coming out in how nature covers

the Second World War. Page 65. Scientific men in wartime.

...