Gerallt Pennant sy'n sgwrsio efo'r Athro Deri Tomos am y bioffisegydd Herbert Wilson. Gerallt Pennant chats with Professor Deri Tomos about the biophysicist Herbert Wilson. Show more
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Gerallt Pennant sy'n sgwrsio efo'r Athro Deri Tomos am y bioffisegydd Herbert Wilson. Gerallt Pennant chats with Professor Deri Tomos about the biophysicist Herbert Wilson. Show more