Yr Athro Deri Tomos a Bryn Tomos yn edrych ar yr ymennydd mewn henaint. Professor Deri Tomos and Bryn Tomos look at the brain in old age.
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Yr Athro Deri Tomos a Bryn Tomos yn edrych ar yr ymennydd mewn henaint. Professor Deri Tomos and Bryn Tomos look at the brain in old age.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
