Why did many europeans in the 1400s want to find a way to get to east asia?
a. europe had almost no natural resources left.
b. europe was overcrowded with too many people.
c. east asia was known for its gold, jewels, and spices.
d. europeans were adventurous people who liked to explore.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

no because we were not ready for war