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Five years ago, people around the world were enduring COVID lockdowns as we attempted to prevent the spread of the virus. Today, many of those who caught COVID-19 are still suffering from lingering symptoms, including a loss of their sense of smell. And that got the Unexpected Elements team thinking about all things olfactory.

First up, hold your noses as we investigate the two chemicals that make up the scent of death.

Next, are you prone to telling lies? Well, research suggests that your nose might give you away!

We then turn our attention to the cinema to find out more about the chemicals you release during a scary film.

We’re also joined by chemist Professor Matija Strlic, who reveals how he can detect aromas in ancient Egyptian mummies and – crucially – tells us why he wants to do this.

That, plus many more Unexpected Elements.

Presenters: Marnie Chesterton, with Kai Kupferschmidt and Affelia Wibisono
Producers: Alice Lipscombe-Southwell, with William Hornbrook, Debbie Kilbride, Imaan Moin and Noa Dowling