Ein Byd Bach
Dwfn
How deep the earth is, and where are the deepest places, such as the Mariana Trench in the Pacific Ocean. A visit to the Krubera Cave in Georgia and information about gorges
Ein Byd Bach airs on S4C at 6:50 AM, Tuesday 22 September. (Subtitles, repeat.)
Topics
Children's ➝ Youth Programmes
Entertainment - Pre-Teens
Education ➝ Science ➝ Factual Topics
General