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Forms of life from the past, e.g dinosaurs.
tigris and euphrates rivers
Rivers
Settling next to rivers gave them water for crops, drinking, etc.
The people of Mesopotamia had a tendency to settle along waterways and rivers. This is what was known as the river valley concept of these people.
probably both probably both
The land near rivers has fertile soil.
hang he river and yeallow river
People usually settle where there is good climate, good soil, and water. People will settle near rivers but cataracts, mountains, and deserts will prove barriers to settlers.
It enables them to stop hunter gathering and settle down into social communities, freeing some people to think about art, science and community.
in the chinook, and azui rivers
Swans fly, usually in pairs. Swans mate for life. They often settle in one area and return to it year after year. But the short answer is, people don't have to "put" them there. They fly.