[blam]

"If the Vinland map is authentic, why is Greenland shown as an island?"

"This wasn't known until several centuries after the alleged time of the map, if authentic."

Don't know. Maybe the Inuit/natives told them?

[curmudgeonII]

Maybe the Inuit/natives told them?

Using Occam's razor, it's much more likely that the map is a very clever fake. [Unfortunate, as I'd like to believe that it's legitimate.]