They made Channels underground a lined with clay to prevent sepage in the surrounding soil. They were a big contribution and we still do something inspired by that today.
Conclusions of archeologists were based on artifacts found over a large area. Exact dates cannot always be determined, and scientists don't always agree on the data provided by the evidence. New discoveries may contradict theories that have already been accepted.
Cactus Hill site has human remains that have been dated to about 20,000 years ago. Due to its location in Virginia proves that human beings had arrived in America earlier than this. That data contradicts the theory that claims that humans reached America from Siberia through the modern day Bring Strait.
The Cactus Hill Archaeological Site is located on a wind-deposited terrace of the Nottoway River in Sussex County.
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Answer:
Grant initially planned a two-pronged approach in which half of his army, under Maj. Gen. William Tecumseh Sherman, would advance to the Yazoo River and attempt to reach Vicksburg from the northeast, while Grant took the remainder of the army down the Mississippi Central Railroad.
Explanation:
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