It show that civilians had a understanding of astronomy
The African kingdom that used seashells as it is form of currency is Mali Kingdom
The reason for Ohio population grew that time was because the state disallowed slavery, it was also open to trade. It became an industrial state and also became an area for Native Americans to live. The place was an active area for living and family raising.
Answer:
Aqueducts
Explanation:
First developed around 312 B.C., these engineering marvels used gravity to transport water along stone, lead and concrete pipelines and into city centers.
