The Grand Canyon, which marks 100 years as a national park on Feb. 26, 2019, is known today as an iconic natural wonder. But early European visitors weren't impressed.
Elk on the move in Yellowstone National Park.
NPS/Neal Herbert
What is the best way to conserve US national parks in a climate-altered future? One answer is connecting parks and other public lands, so plants and animals can shift their ranges.
Sunrise on Angel’s Window, North Rim, Grand Canyon National Park.
National Park Service/Wikimedia