Griff Rhys Jones joins Matt Baker and AlexJones to talk about his Great Welsh Adventure.Fourteen pianists perform the Moonlight Sonata accompanied by live shots of the Moon from the Stargazing cameras in Norfolk. Miranda Krestovnikoff discovers a huge number of mammoth bones under the North Sea.Marty Jopson watches a self-sinking ship deliver an oil rig to Scotland and Tony Livesey meets a group of people tackling the housing crisis by building their own council houses.