PHYS ORG Seismic lines dissect northern Alberta, Canada. Photo by Roland Roesler Half of the Earth's land surface not covered with ice remains relatively wild—but many of these "low human-impact" areas are broken into small, isolated pieces, threatening their future. Story here. RELATED: The more we carve up natural landscapes with roads and fields, the closer we’re pushing large predators like lions and wolves, toward extinction. by Larry Powell