Why did nomads have to move constantly

They moved with the changing seasons to get food and water for their animals. Their animals provided milk, meat and skins for the nomads.

there is often only a small difference between what is legal and what is ethical when working with competitive intelligence..

i disagree that there is little difference between adult female development and adult male development. sociological studies comparing female and male pathways to adulthood, revelead that there are sustancial differences between them. particularly, female and male differ from timing of marriage, when they began to live with children and the likelihood of combining wife/husband and parent roles.