Dal Pen RheswmHeddyr Gregory yn cyflwynoBBC Radio Cymru Duration: 30 o funudauFirst broadcast: Thu 22nd Feb 2018, 12:00 on BBC Radio CymruLatest broadcast: Thu 22nd Feb 2018, 12:00 on BBC Radio Cymru 2Sgwrs i geisio rhoi'r byd yn ei le. Conversation to put the world to rights.GenresFactualFormatsDiscussion & TalkBrandDal Pen Rheswm Source: BBC Online