The singer-songwriter and social activist best known as one-third of the folk-music group Peter, Paul and Mary, has died at age 86.

Peter Yarrow, the singer-songwriter, activist and founding member of the folk trio Peter, Paul and Mary, has died at 86 after battling bladder cancer.

With their distinctive three-part harmonies, Peter, Paul and Mary — with Noel Paul Stookey ... class I saw the transformational power folk music had,” he told Westword in 2015.

The singer and songwriter who helped popularize folk music in the 1960s died of bladder cancer at his home in New York.

Yarrow formed and contributed compositions to Peter, Paul and Mary. The folk music revival of the 1960s catapulted the group into stardom, as the trio found success with original songs like "Puff ...

Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk-music trio whose impassioned harmonies transfixed millions as they lifted their voices in favor of ...

Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk-music trio whose impassioned harmonies transfixed millions as they lifted their voices in favor of ...

Peter Yarrow, who has died aged 86, was the Peter in Peter, Paul and Mary, the American singing trio which took folk music into the commercial mainstream in the 1960s. Peter and Paul (full name ...