Pa anifail sydd â'r tafod hiraf? Dr. Hefin Jones o Brifysgol Caerdydd sy'n ymuno ag Aled. Which animal has the longest tongue? Cardiff University's Dr. Hefin Jones joins Aled. Show more
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Pa anifail sydd â'r tafod hiraf? Dr. Hefin Jones o Brifysgol Caerdydd sy'n ymuno ag Aled. Which animal has the longest tongue? Cardiff University's Dr. Hefin Jones joins Aled. Show more