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Welcome to the documentary in the studio from the BBC World Service.
I'm Julian May and this is the series that pushes open the doors and goes into the places where the world's most inventive artists are at work.
That's the huge door of the workshop in Bradford, in the north of England,
where the artist Luke Jerram is creating his latest work, which is called A Good Yarn.
The door slides back to reveal a skeletal spherical framework.
We've been tasked to fabricate a three metre diameter metal sphere that's going to form the basis of Luke Jerram's A Good Young.
Luke's working with a team of ingenious engineers.
They can make practically anything.
It seems absolutely massive here,
whereas I know that if you put it out on the street it will shrink by about 20%.
So it's funny how artworks change like that.
It's all steel.
Steel rod, all welded together.
It's quite a handsome thing.
It's a very splendid thing, just as it is.
And what are you going to do now?
Yeah, so the next stage is wrapping this entire three-metre sphere with a kilometre of rope.
It's going to be quite a journey.
Yeah, a lot of fun, though.