Do space and time truly exist? What is reality made of? Can we understand its deep texture? Scientist Carlo Rovelli has spent his whole life exploring these questions and pushing the boundaries of what we know.

He describes how our understanding of reality has changed throughout the centuries, from the philosophers and scientists of antiquity to contemporary researchers into quantum gravity.

Episode 4: The Dances of Time
As the very notions of space and time are called into question, scientists are exploring theories of quantum gravity in order to find answers to some of the great mysteries about the structure of the physical world.

Author: Carlo Rovelli
Reader: Mark Meadows
Abridger/Producer: Sara Davies

A Pier production for BBC Radio 4. Show less