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So this week, I got to ride on a train.

This is Marnie Chesterton. This is Marnie Chesterton from unexpected elements on the BBC World Service.

And that noise is a beautiful steam train right in front of me, taking me down the Welsh valleys. And the technology that I'm travelling on has been carrying passengers for 200 years. And it's still enchanting. chanting.

Yes, this is unexpected elements, the show that takes the story you may be seeing in the news and looks at some of the unexpected science elements underneath.

And this week we are talking trains as the 27th of September marks the 200th anniversary

of the voyage of the first passenger steam train and thus the beginning of

modern railways as we know them. And I'm not conducting this show alone. Joining me in the

first class science carriage are a couple of first class journalists. In Mumbai, India, we have

Chavi Satchdev. Hello. Oh, Karamjari.

And in Helsinki, Finland's Tristan Ahton, tickets, please.

And day, on day, on, day on bon. Nice to see everybody.

And welcome listeners to all of the train stories, all of the time from all over the world.

You can tell Chavi, Tristan, I'm excited about this topic.

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