An excerpt from "Lies My Teacher Told Me", a list of times when other peoples "discovered" America:
"Moderate" seems like a rather drastic overstatement for several of those proposals. For example:
Theory of Phoenician discovery of the Americas
The theory of Phoenician discovery of the Americas suggests that the earliest Old World contact with the Americas was not with Columbus or Norse settlers, but with the Phoenicians (or, alternatively, other Semitic peoples) in the first millennium BC.