Answer:
Due to lack of technology.
Explanation:
It took several centuries before the civilizations of the two hemispheres had communication because of lack of technologies that can make a bridge of communication between two hemisphere. People are not interested in research and having old wrong beliefs that prevent them from growth and development but due to renaissance movement people get rid of false and wrong beliefs and work for the advancement of technology which leads to communication between two hemisphere.
I think it might be To evacuate wounded soldiers from West Germany and if it wrong I'm so sorry and the easiest way to get your points back is for me to ask a question and you answer it and you will get it back and if its right then yay its great for both of us you got the answer right and I helped you learn.
A chimpanzee is homo sapiens sapiens, humans, closest relative. Both species share a common ancestor.
Answer:
He meant that they faced lots of danger
