Ancient Oceans

9:20 PM to 9:30 PM

Tuesday 22 April

The Ordovician

Season 1 Episode 1 of 2

A look at Earth's major bodies of water in prehistoric times, beginning with the Ordovician period more than 400 million years ago when there was no plant or animal life on land and invertebrates and arthropods dominated the oceans

Ancient Oceans airs on RTE2 HD at 9:20 PM, Tuesday 22 April. (Subtitles, repeat.)

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