Mathematician Marcus de Sautoy champions the blind Argentinian writer Jorge Luis Borges. He is fascinated by the connection between the creator of 'The Library of Babel' and science - did Borges really understand notions of infinity and space?

Biographer Jason Wilson adds colourful detail to the life of a great writer whom he insists was just being impish when it came to the weighty matters that have excited more than one mathematician over the years.

The programme includes beautiful recordings of Borges in conversation in 1971. Marcus du Sautoy is the Charles Simonyi Professor for the Understanding of Science.

Presented by Matthew Parris.

Produced by Miles Warde.

First broadcast on BBC Radio 4 Extra in 2014.

Marcus du Sautoy on Jorge Luis Borges