
经济增长
The American Dream is much older than you think
When President Barack Obama created Deferred Action for Childhood Arrivals (DACA), the 2012 program that offered undocumented young people brought to the U.S. as children a path into soci...
Shane Miller is a prehistoric archaeologist whose primary research interests are the Ice Age colonization of the Americas, the origins of agriculture in eastern North America, and how we can use lithic technology, Geographic Information Systems (GIS), and geoarchaeology to make inferences about past human behavior.