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Here on Unexpected Elements, we've been glued to the drama of the Paralympic games in Paris. But it's not just the thrill of the competition that's got us hooked, we've also become obsessed with some of the high-octane training regimes undertaken by the athletes.

Take American 'Armless Archer' Matt Stutzman, who shoots arrows through the windows of his own house and car to recreate the high pressure of the Olympic stadium. He's chasing a thrill, and so are we!

We hear about the research on one extraordinary woman who had a medical condition which caused her to have no fear.

And we follow the fate of an extraordinary marine creature, who detaches his own arm in his quest for a mate.

We hear about why humans love to be scared - as long as it's all in good fun.

And we hear about the space debris falling to earth, and the thrilling quest of a plane full of scientists who want to watch it fall.

That and loads more unexpected elements in this week's show.

Presenter: Marnie Chesterton, with Tristan Ahtone and Affelia Wibisono
Producer: Emily Knight, with Harrison Lewis, Dan Welsh and Noa Dowling
Sound engineer: Gwynfor Jones