By the 1960s, humpback whales and other whale species had been hunted extensively, sometimes to the point of near extinction. Then a recording of humpback whale songs helped shift public opinion on the hunting of all whale species. Luis Robayo/AFP/Getty Images hide caption

itoggle caption Luis Robayo/AFP/Getty Images

Pianist Simone Dinnerstein has a passion for rhythmically free musical lines. Lisa Marie Mazzucco/Courtesy of the artist hide caption

itoggle caption Lisa Marie Mazzucco/Courtesy of the artist

Judy Collins appears on the World Cafe Live for a performance. Courtesy of the artist. hide caption

itoggle caption Courtesy of the artist.