Human migration is the movement by people from one place to another with the intentions of settling, permanently or temporarily in a new location.
An ion is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.
Map Shows How Humans Migrated Across The Globe by Science Insider
The movement is often over long distances and from one country to another, but internal migration is also possible; indeed, this is the dominant form globally.
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A person who moves from their home to another place because of natural disaster or civil disturbance may be described as a refugee or, especially within the same country, a displaced person.
A refugee, generally speaking, is a displaced person who has been forced to cross national boundaries and who cannot return home safely.
A person seeking refuge from political, religious, or other forms of persecution is usually described as an asylum seeker.
An asylum seeker is a person who flees their home country, enters another country and applies for asylum, i.e. the right to international protection, in this other country.
Nomadic movements are normally not regarded as migrations as there is no intention to settle in the new place and because the movement is generally seasonal.
A nomad is a member of a community of people without fixed habitation who regularly move to and from the same areas, including nomadic hunter-gatherers, pastoral nomads, and tinker or trader nomads.
Also, the temporary movement of people for the purpose of travel, tourism, pilgrimages, or the commute is not regarded as migration, in the absence of an intention to live and settle in the visited places.
The World Bank has published its Migration and Remittances Factbook annually since 2008.
The World Bank is an international financial institution that provides loans to developing countries for capital programs.
A remittance is a transfer of money by a foreign worker to an individual in his or her home country.
The International Organisation for Migration has published a yearly World Migration Report since 1999.
The International Organization for Migration is an intergovernmental organization that provides services and advice concerning migration to governments and migrants, including internally displaced persons, refugees, and migrant workers.
The United Nations Statistics Division also keeps a database on worldwide migration.
The United Nations Statistics Division, formerly the United Nations Statistical Office, serves under the United Nations Department of Economic and Social Affairs as the central mechanism within the Secretariat of the United Nations to supply the statistical needs and coordinating activities of the global statistical system.
Recent advances in research on migration via the Internet promise better understanding of migration patterns and migration motives.
Substantial internal migration can also take place within a country, either seasonal human migration, or shifts of population into cities or out of cities.
Studies of worldwide migration patterns, however, tend to limit their scope to international migration.
International migration occurs when people cross state boundaries and stay in the host state for some minimum length of time.
The World Bank's Migration and Remittances Factbook of 2011 lists the following estimates for the year 2010: total number of immigrants: 215.8 million or 3.2% of world population.
In 2013, the percentage of international migrants worldwide increased by 33% with 59% of migrants targeting developed regions.
Almost half of these migrants are women, which is one of the most significant migrant-pattern changes in the last half century.
Women migrate alone or with their family members and community.
Even though female migration is largely viewed as associations rather than independent migration, emerging studies argue complex and manifold reasons for this.