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The nose of a dog is incredibly sensitive. And odour contains information. With the help of AI, electronic ‘noses’ are being used to sniff out complex odours, including diseases. Chris Vallance visits a company developing the technology.

Also this week: Shiona McCallum is in Paris to see the tech that can help us understand sleep. And Liv McMahon accompanies Chris on a walk in a park. There, they try one of many bird identification apps that are proving a hit, especially with younger users.

Presenter: Chris Vallance
Producer: Tom Quinn

(Image: A photo of a cute mixed breed dog with black fur. It is sitting down, looking up at the camera. Its nose is prominent in the foreground. Credit: Getty Images)

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