I'm confused. Are you asking ''What happened when...'' or asking for our imput on what we think should have happened?
Answer:
56cm SQUARED
Explanation:
7 x 8 = 56. Now convert to the unit 'CM'.
America and the Soviet Union didn't trust each other and so stockpiled massive nuclear weapons
The Romans had historians. This meaning the Roman legacy went on in Europe for centuries, even long after the fall of the Roman Empire. The Incas had no writing that I know of but maybe it just was not deciphered. They were conquered by the Spanish (because they had better weapons such as guns).This meant much of their history was lost when the Spanish conquered the area. Hope this helps and please give brainliest it would help me reach expert ;)
Geographic isolation and different living conditions.
Explanation:
Both the Neanderthal and the Homo sapiens shared the same ancestor, the Homo erectus. The Homo erectus managed to spread from Africa to Eurasia. The populations started to become geographically isolated from each other, and over time this caused speciation.
The Homo erectus from the far East, with the one from Europe, or the one from Africa, didn't had contact. This was due to big distance and natural barriers. Gradually this species was evolving, and because of the different living conditions and the geographic isolation at different places it started to develop different characteristics. This has led to evolution of different species over time, with the Neanderthal evolving in Eurasia, as well as the Denisovan Man, while in Africa it was the Homo sapiens that emerged.