- Archaeological Outliers - Artifacts thought by some to suggest pre-Columbian contacts between the Old and New Worlds. J. Huston McCulloch presents photographs and commentary with references.
- Mysteries of the Ancient High Cultures - Similarities in artifacts from ancient Old World and New World cultures.
- Roman Head from Calixtlahuaca - A small terracotta head found in 1933 in a pre-Hispanic burial at Calixtlahuaca in the Toluca Valley has been identified by Bernard Andreae and others as Roman of circa 200 AD.
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