At the National Historic Landmark of Obsidian Cliff, the molten lava that ... United States to sign a new law making Yellowstone the first national park. Pull over at one of the scenic road ...
Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park ... in Yellowstone. In samples gathered at Obsidian ...
A merican Bison once numbered in the millions but they were hunted neary to extinction throughout the United States during ...