Who discovered America? The controversy has been waging for nearly 500 years. Here is an in-depth study of not one or two but literally dozens of possible pre-columbian "discoveries" and 2,000 years of global traders.
In this study, scholars who allege that non-native Americans sailed accross the oceans to America and had an impact on the way their hosts lived are called "transocean culture diffusionists." According to them, the Americas were purposely visited for trade by persons accidently driven by storm-tossed drift voyages. Such scholars hold that intersocial contacts were, and are, normal.

EXPERTS ARGUE (About Who First Discovered America):
The Diffusionist-Inventionist Controversy.
Chapters include:

• Prehistoric and Ancient Atlantic Travelers
• Transatlantic Contacts with Medieval Europe
• Norse Expeditions to North America
• Transpacific Contacts, General
• Transpacific Contacts: Oceania, China and Japan
• Sub-Sahara Africa Connection; Biological Evidence; Basic Issues
• Critical and Favorable Appraisals of Diffusion
• Bibliography