Answer:Many thousands of years ago, not a single human being lived in the Americas.
This only changed during the last Ice Age. It was a time when most of North America was covered with a thick sheet of ice, which made the Americas difficult to inhabit.
But at some point during this time, adventurous humans started their journey into a new world.
They probably came on foot from Siberia across the Bering Land Bridge, which existed between Alaska and Eurasia from the end of the last Ice Age until about 10,000 years ago. The area is now submerged by water.
There is still debate about when these first Americans actually arrived and where they came from. But we are now getting closer to uncovering the original narrative, and finding out who these first Americans really were.
Explanation:
The main reason why slavery spread was that people owned large pieces of lands and they needed cheap work force. What better for them than to have a work force that was strong and completely free.
Answer:
The Eurasia culture (4000 and 3000 BC) is the first evidences of warfare on horseback.
Explanation:
Throughout the Ancient Near East, there was improved harness and chariot designs in 1600 BC. These were made made for chariot warfare.
An illustration of Sumerian shows that around 2500 BC there were some type of equine pulling wagons.
There were training manual written for war on horses which was a guide for training chariot horses written. This was earlier written about 1350 BC.
There was improved effectiveness of horses in battle which were due to improvements and inventions in technology. These included the invention of the saddle, the stirrup, and later, the horse collar.
T lines up with the actual size of objects in space.
