Yellowstone volcano eruption: Volcanic ash fallout would cover MILLIONS across USA YELLOWSTONE volcano could cover the entire United States in volcanic ash if the next eruption equals or surpasses Yellowstone’s past super-eruptions, scientists have warned. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Manhattanhenge 2017: When is the next Manhattanhenge, where to see the New York sunsetLife on Mars? Red Planet 'covered in water far longer than originally thought'Ancient Egyptian DNA analysis reveals THIS about their geneticsThought Experiment: Ben Carson’s Thinking, and How Poverty Affects Your State of MindNew York Blood Center Reaches a Deal to Help Care for Research ChimpsA Look at Major Drug-Pricing Proposals