
                 <p>500 years ago, the Incas ruled the western half of South America with the help of a unique form of writing based on coloured and knotted strings. Researchers think they're getting closer to deciphering these strings, known as khipus. </p><ul><li>Guest: Professor Sabine Hyland, anthropologist from the University of St Andrews</li><li>Producer: Sarah Allely</li></ul><p>Originally broadcast in June 2025.</p> 
            

500 years ago, the Incas ruled the western half of South America with the help of a unique form of writing based on coloured and knotted strings. Researchers think they're getting closer to deciphering these strings, known as khipus. 
Guest: Professor Sabine Hyland, anthropologist from the University of St Andrews
Producer: Sarah Allely

Originally broadcast in June 2025.

The mysterious Inca code of knotted strings

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