Changing Cancer Treatment, Understanding Mankind

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A photographer taking pictures of the Neanderthal man ancestor's reconstruction, displayed in a show of the Prehistoric Museum in Halle, eastern Germany.

Dr. Jedd Wolchok and Mary Elizabeth Williams discuss how Immunotheraphy treatment works and how it could change the way cancer is treated from now on. Carmen de Lavallade talks about her life, career, and the New York premier of her new performance, "As I Remember It." Andrew Jarecki discusses his six-part documentary series "The Jinx: The Life and Deaths of Robert Durst." Yuval Noah Harris discusses his new book, Sapiens: A Brief History of Humankind.