- Barn 121 (Chwefror 2019): Robotiaid Cymdeithasol, Cynllunio Babis, Hoffter Te a Choffi
- Barn 122 (Mawrth 2019): Bacteriwm Alzheimer, Newid Hinsawdd ac Amaeth
- Barn 123 (Ebrill 2019): Common Voice, Athrawon Robot, Beddau Megalithig, Poblogaeth Ewrop (40,000 CC)
- Barn 124 (Mai 2019): Twll Du, Chicxulub
- Barn 125 (Mehefin 2019): Hel defaid, Meteor, Arogli Iechyd
- Barn 126 (Haf 2019): Masnach mycorhisa, Cost a Llygredd Cyffuriau
- Barn 127 (Medi 2019): Eisteddfod Llanrwst
- Barn 128 (Hydref 2019): Theori’r Hudlath, Meddwl Ramanujan, Cwsg
- Barn 129 (Tachwedd 2019): Terminator, DWP digidol, Goruchafiaeth Cwantwm
- Barn 130 (Nadolig 2019): Optimistiaeth ôl-apocaliptaidd, Y Cof, Hunan Fragu
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