Matthew Brown

The investigation commissioned by Interior Secretary Deb Haaland found marked and unmarked graves at 65 of the more than 400 U.S. boarding schools where Native American children were forcibly assimilated into white society. The findings don't specify how each child died, but officials said the causes of death included disease and abuse during a 150-year period that ended in 1969.

Dozens of bison from a mountain park outside Denver were transferred Wednesday to several tribes from across the Great Plains, in the latest example of Native Americans reclaiming stewardship over animals their ancestors lived alongside for millennia.