One of the main objections to the possibilities of a contact of the Old World Celts with the New World Indians is that the Celts were not a seafaring people and that they did not possess the navigational skills to maintain commercial sea ports along the shores of the North Atlantic. This of course is a half-truth and is contradicted by good classical sources.
These Greek and Roman sources knew from their Celtic neighbors much about the geography of the Atlantic coast and of the existence of a continent on the other side of the ocean.
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