Show far north Is I 1 warming up the alie gulf stream has warmed the arctic ocean enormously in recent lears bears the arctic ocean Is believed to have been ice free between COO A D and 1100 A D it was during tills this period that the norsemen norseman Nor semen are supposed to have hare discovered america kmer and found its northeastern coast so barm that grape vines grew there and for that reason called it vine land the fact that greenland now coerced with an enormous depth of ice as once a luxuriant forest durins during prehistoric ages Is in dilated by plant fossils in the rocks |