This week, the Professor of Ignorance John Lloyd and his curator Noel Fielding welcome:

* Dr Janina Ramirez, art historian, author and TV presenter. Janina is Course Director for the Undergraduate Certificate in History of Art at the University of Oxford.

* Peter Frankopan, Senior Research Fellow at Worcester College, Oxford, Director of the Oxford Centre for Byzantine Research and author.

* Jenny Colgan, a novelist who writes romantic comedies, sci-fi and children's books.

The Museum's Guest Committee appreciate a medieval polymath nun who created her own language; a collection of food additives from the 1970s; and an infinite number of colours that exist only in the mind and all with the same name.

Researchers: Mike Turner and Anne Miller of QI

Producers: Richard Turner and James Harkin

A BBC Studios production for BBC Radio 4 first broadcast in August 2016. Show less