Yr Athro Deri Tomos sy'n ymuno ag Aled i drafod arogleuon y corff. Why does everyone smell differently? Professor Deri Tomos joins Aled. Show more
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Yr Athro Deri Tomos sy'n ymuno ag Aled i drafod arogleuon y corff. Why does everyone smell differently? Professor Deri Tomos joins Aled. Show more
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
