Irish History Dvd

Important of Historiography

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Mosasaurs 101 | National Geographic
Ichthyosaurs 101 | National Geographic
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Ichthyosaurs 101 | National Geographic

– [Narrator] While dinosaurs roamed the Earth and pterosaurs ruled the sky, sea monsters called ichthyosaurs dominated the world’s oceans. Ichthyosaurs were ancient reptilian predators. They first appeared about 251 million years ago during the Triassic Period. 20 million years

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