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We revisit our listeners’ favourite topics and dig deeper in this special programme.

First, we hear from some of our insomniac listeners and explore how we fall asleep with neuroscientist Dr Ada Eban-Rothschild from the University of Michigan.

Next, we return to our favourite food facts with a small surprise for one of the presenters.

Then, we put our knowledge to the test with extra quizzes and examine the randomness of multiple-choice questions.

Finally, we’re joined by Dr Alyn Euritt to discuss the importance of connection, especially between Marnie, Caroline and all the loyal listeners of the show.

All that, plus many more Unexpected Elements.

Presenters: Caroline Steel and Marnie Chesterton
Producers: Imaan Moin, with Margaret Sessa-Hawkins and Lucy Davies