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 pioneering folk musician who found massive success as part of the musical trio Peter, Paul, and Mary, has died at the age of 86, according to the Associated Press.

Peter Yarrow, one third of the chart-topping 1960s folk trio Peter, Paul and Mary — which helped popularize Bob Dylan as the voice of a generation — co-writer of the song “Puff, the Magic Dragon” and ...