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Iolo's Natural History of WalesThe First 200 Million Years Clips
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Tracking trails
Duration: 01:32
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Silurian seas
Duration: 01:29
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Hirnantian ice age
Duration: 01:04
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Spore story
Duration: 01:54
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Sea of Snowdon
Duration: 00:45
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Creepy crawlies
Duration: 01:33
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Pioneering plant
Duration: 02:28
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Trilobite treasure
Duration: 01:43
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Time of volcanoes
Duration: 02:12
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Soft-bodied survivors
Duration: 01:16
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Pre-Cambrian Wales
Duration: 01:34










