Due to the mountains and craters-rich vertical axis that distinguish the Americas, Australia, and Africa, people found expanding too hard as the climate dramatically changed along with the change of latitude. As humans eventually conquered the change in temperature by clothes, animals surely did not, so they could not travel between the arctic climate north of Mesoamerica and the tropical climate of South America. On the other hand, food production and domesticates spread through Eurasia pretty quickly due to the vast horizontal spaces that allowed fast migration without having to worry about climatic changes. The speed of expansion of food production varied considerably that it spread from the Philippines east to Polynesia at a rate of 3.2 miles per year while at a rate of 0.3 miles per year from Mexico northward to the U.S. Therefore, Eurasia did not only have the advantage in the origins of food production and domesticates, but also in the rate of diffusion of these compelling factors of
Due to the mountains and craters-rich vertical axis that distinguish the Americas, Australia, and Africa, people found expanding too hard as the climate dramatically changed along with the change of latitude. As humans eventually conquered the change in temperature by clothes, animals surely did not, so they could not travel between the arctic climate north of Mesoamerica and the tropical climate of South America. On the other hand, food production and domesticates spread through Eurasia pretty quickly due to the vast horizontal spaces that allowed fast migration without having to worry about climatic changes. The speed of expansion of food production varied considerably that it spread from the Philippines east to Polynesia at a rate of 3.2 miles per year while at a rate of 0.3 miles per year from Mexico northward to the U.S. Therefore, Eurasia did not only have the advantage in the origins of food production and domesticates, but also in the rate of diffusion of these compelling factors of