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nomads
As Heat migrates, so do the Organisms that enjoy Heat.
the great migration
joshua
Mutation, Natural Selection, Migration, and Genetic Drift.
Humans don't migrate, but they were following the herds.
The spread of migration of small farmers into cities caused unemployment which led to the decline of the empire.
Migration can lead to a loss of skilled workforce in the country the migrant is leaving, which could impact sectors such as healthcare and education. It may also decrease the working-age population and limit economic productivity. Additionally, if a large number of skilled individuals leave, it can hinder the country's development and growth.
Over population will usually lead to a lack of employment opportunities.
Allele frequency is altered by genetic drift, natural selection, migration, mutation, or nonrandom mating. This results in a change in genetic equilibrium in a population that is evolving. Evolution leads eventually to speciation.
John Winthrop lead a large migration of Puritans. This started in England and the beliefs were strict.
A sever drought forced many to migrate west.