The Columbian Exchange: Biological and Cultural Consequences of 1492

evidence

Establishes the biological framing of post-1492 contact — crops, livestock and pathogens moving between hemispheres — used throughout this pack. V55 verification basis: this session had no outbound network access (WebFetch blocked by egress policy, WebSearch budget exhausted), so the book was not consulted; the citation is given from the author's knowledge and the work is a standard, widely held title that a curator can verify in any research library catalogue.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.