Artemisia Gentileschi and Frida Kahlo were born centuries apart, but both defied societal expectations, establishing themselves as extraordinary artists and women. In this “The Week in Art” podcast from The Art Newspaper, curator Letizia Treves tours the temporarily-shuttered “Artemisia” exhibition at London’s National Gallery, and author Hettie Judah guides us through her new Kahlo biography, offering illuminating insights into the life of the enigmatic Mexican painter. —E.C.