Dei Huws sy'n trafod prosiect sydd â'r nod o gynhyrchu map o waelod y môr. Dei Huws tells Aled about a project to produce the definitive map of the bottom of the ocean by 2030. Show more
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Dei Huws sy'n trafod prosiect sydd â'r nod o gynhyrchu map o waelod y môr. Dei Huws tells Aled about a project to produce the definitive map of the bottom of the ocean by 2030. Show more