Mark Volman, a cofounder of the Turtles and the cosinger on several of their hit songs, has died. He was 78. Over his five-decade career, Volman also performed with fellow Turtles cofounder and singer Howard Kaylan as Flo & Eddie, who released albums as a duo and also performed on songs by Bruce Springsteen, T. Rex and Frank Zappa. According to Variety, Volman died in his home in Nashville on Friday after a sudden illness. In 2023, Volman revealed he had dementia. He noted at that time that he was diagnosed in 2020, but did not discuss his illness as...