Happy 150th, Yellowstone! March 1, 2022, marks the 150th anniversary of the establishment of #Yellowstone National Park. Signed into law by President Ulysses S. Grant, America's first national park was set aside to preserve and protect the scenery, cultural heritage, wildlife, geologic and ecological systems and processes in their natural condition for the benefit and enjoyment of present and future generations. Yellowstone serves as the core of the Greater Yellowstone Ecosystem, one of the largest nearly intact natural ecosystems remaining on the planet. @yellowstonenps has the most active, diverse, and intact collections of combined geothermal features with over 10,000 hydrothermal sites and half the world's active geysers. The park is also rich in cultural and historical resources with 25 sites, landmarks and districts on the National Register of Historic Places. Based on the park’s location at the convergence of the Great Plains, Great Basin, and Columbia Plateau, many Native A...