Researchers at the South Dakota School of Mines and Technology are using 3-D imaging and other modern tools to reveal the history of Lakota artifacts.
They're also testing how to ensure the authenticity of those works through the use of invisible marks.
The effort includes staff at the Center for Security Printing and Anti-Counterfeiting Technology, which is developing new ways to guard against forged money, pharmaceuticals, electronics and other items.
Researchers can test the items without disturbing them, which is important for both cultural sensitivities and when handling delicate items, such as a child's moccasin from the 1890 Wounded Knee Massacre and a century-old pouch.
The researchers have also started testing how to put invisible QR codes on artwork and other valuable pieces to prove they're authentic.