These days, largely thanks to science fiction movies, most of us will be familiar with the idea of black holes – regions of spacetime where gravity is so strong that nothing, not even light, can escape it. But what about white holes?

In this episode we catch up with theoretical physicist Carlo Rovelli, author of the book White Holes: Inside the Horizon.

He tells us all about his ground-breaking work investigating what is happening inside black holes, how they can give birth to white holes and how white holes may be the best candidate for dark matter yet.
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