Tuesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally or krvs.org) features recent tracks by The Cactus Blossoms, Courtney Marie Andrews, The Deslondes, Eilen Jewell and Robert Plant. Also: some Dylan, Donovan, Velvet Underground, Zuider Zee, Roy Orbison, Flamin' Groovies, Darbuki Kings and Quicksilver Messenger Service.