What was the first national park in the US?
Yellowstone became the first US national park in 1872, and it is widely considered the first national park in the world.
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Yellowstone Facts
Yellowstone facts and facts about yellowstones, from the Random Facts shelf.
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When were wolves reintroduced to Yellowstone?
Gray wolves were reintroduced to Yellowstone National Park in 1995. Their return changed elk behavior and helped plants, beavers, and other wildlife recover, a chain reaction called a trophic cascade.