Vikings Definitely Came to the New World Before Columbus. Did Celtic Monks, the Chinese, and Phoenicians Do So Also?

Many brave sailors arrived in North and South America long before Columbus, suggesting that trans-oceanic voyages could be accomplished centuries before his voyage. Some think that the Atlantic was crossed as far back as the Bronze Age. While written records of such voyages are often poorly sourced, archeology keeps rewriting the story about Old World visitors to the New World.