Existing comment:
Moving Across Time and Continents:
Throughout history, humans have migrated from one place to another for many reasons -- in search of sustenance, freedom, or opportunity; fleeing war, oppression, or natural disaster; moving voluntarily or against their wills. For much of its history, the United States has been a principal (though not the only) destination for migrants. This dynamic, radiant globe shows the movements of people across time and continents -- from the pre-historic beginnings of modern humans' existence to our world today. |