This year quantum physics celebrates its 100th anniversary. And while we’ve made great progress in understanding its many intricacies and quirks, it’s likely that quantum behaviour will continue to fascinate and beguile scientists around the world for years to come.

In this episode we speak to Prof Jim Al-Khalili, a theoretical physicist based at the University of Surrey, author of several best-selling books and the long-time presenter of BBC Radio 4’s The Life Scientific.

He tells us about the many disagreements that have surrounded quantum theory over the past century, how the theory raises deep scientific and philosophical questions about the nature of reality itself, and why we still have so much to learn.

Watch the episode here.

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