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This week, Cameroon’s Paul Biya announced his plan to run for an 8th term as president at the grand old age of 92. So, we have elected to investigate the science of ageing.

First, we ask if a 60-year-old brain is as sharp as a 20-year-old one. Then, we find out about parts of the world that boast impressively long life expectancies. Have these places found the secret to longevity, or are they not what they seem?

Next up, we talk to Professor Thomas Boothby from the University of Wyoming about tiny, eight-legged animals called tardigrades, and what they could teach us about living longer.

We also dig into the story behind a recently uncovered ancient Peruvian city, before finding out the science behind so-called ‘old wives’ tales’.

All that, plus many more Unexpected Elements.

Presenter: Marnie Chesterton, with Camilla Mota and Phillys Mwatee
Producers: Alice Lipscombe-Southwell, with Margaret Sessa-Hawkins, Lucy Davies and Robbie Wojciechowski