Construction continued up to the Ming dynasty (1368–1644), when the Great Wall became the world's largest military structure. Its historic and strategic importance is matched only by its architectural ...

1. Join a club or Volunteer with one A great low stakes way to get involved is through extracurriculars like clubs, which are still running despite the move to online environments. Clubs allow you to ...

Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States ...