A new census by the U.S. Geological Survey shows the population of non-native goats in the Olympic Mountains has more than doubled over the past 12 years. Officials at Olympic National Park are concerned about the impacts on native plants and park visitors. Mountain goats were first introduced in the 1920s, before the park was established, as a target for hunters. The population started out at just about a dozen but is now topping 600. USGS estimates the recent growth rate has escalated to about