Science!

https://www.msn.com/en-us/video/peo...-old-egyptian-map-depicts-america/vi-AA1yyLfD

But if it's true then it's really time to give 'ol Columbus's title of "founding the americas" the boot.
If none of his contemporaries knew, then it still counts. It takes cajones to sail off the end of the world. Even if he was not the first to do it, he was the first to do it and effectively record it.