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A documentary contemplating the 'endless days and nights' that affect Finland.
4/5 American poet and historian Jennifer Michael Hecht argues doubt is 'a beautiful thing'.
3/5 Journalist and writer Madeleine Bunting discusses religious doubt.
2/5 Susan Greenfield argues that doubt among scientists should be 'as natural as breathing'.
Matthew Sweet tracks a Native American movie-maker from California to the London of 1914.
Jonathan Coffey on the story of the cross and how it became the symbol of Christianity.
Exploring how Schubert has been claimed by various movements, from literature to politics.
Professor Raymond Tallis explores the science and culture of immortality.
5/5 Javier Lizarzaburu on the Inca shrine of Pariacaca and what the mountain means today.
Fiona Sampson considers the work of the Nobel Prize-winning Polish poet Czeslaw Milosz.