Maddie Burakoff/Associated Press
A project in Charleston, South Carolina, is using DNA to trace the African roots of three dozen people buried in the late 1700s. The remains were uncovered in the coastal city during construction in 2013. Since then, scientists have learned more about these people and their lives by pulling genetic material from their remains. The research showed most had ties to West Africa and most were likely born into slavery in Colonial America. It's one of a growing number of projects using ancient DNA research. In Charleston, the work has also inspired plans to build a memorial on the burial site.