Hanes Tecwyn Roberts o Sir Fôn, a oedd yn un o arloeswyr cynnar NASA a'r ras i'r gofod. Aled learns about Tecwyn Roberts from Anglesey, one of the early pioneers of space flight. Show more
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Hanes Tecwyn Roberts o Sir Fôn, a oedd yn un o arloeswyr cynnar NASA a'r ras i'r gofod. Aled learns about Tecwyn Roberts from Anglesey, one of the early pioneers of space flight. Show more
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
