Peter Tork, a member of the Monkees, has passed away at the age of 77. Tork, the bassist for the iconic 1960s pop band, died Thursday. A cause of death has not been revealed. In 2009, Tork was diagnosed with adenoid cystic carcinoma but fought his way to be clear of the cancer. “It is with beyond-heavy and broken hearts that we share the devastating news that our friend, mentor, teacher, and amazing soul, Peter Tork, has passed from this world,” read a statement on Tork's official Facebook page.