Native Americans and other non-Eurasian peoples die far more because of Eurasian germs than they do from the Eurasian continent’s guns or steel weapons. In contrast, very few or no specific killer germs were available for European conquerors in the New World. Why is the exchange of bacteria between continents so unbalanced? Tiger King Rick and Morty. Here, the latest results from the molecular biology department will shed light on the problem of showing the relationship between germs and the development of food production in Eurasia rather than in the Americas.