Many pre-Columbian cultures possessed a sophisticated understanding of the heavens. Did they share this knowledge, even across great distances? Similar insights of the Cahokia, Ancestral Puebloans, and Mayans appears to confirm they did.

What happened to the Vikings, led initially by Erik the Red, who had settled in Greenland? Did they perish due to some unforeseen calamity? Or did they relocate to Newfoundland, thus becoming the first European settlers in the New World?