Why are African artists still so often left out of the global story of modern art? At Tate Modern in London, tour guide Nadia Denton is working to change that with what she calls “a voyage of discovery”. Her free ‘African Modernism & Afro-Surrealism’ tour spotlights artists of African descent, challenges old colonial narratives, and opens up conversations about identity, history and belonging inside the gallery space. | BBC News Africa