New conclusions surface about the mighty supervolcano in Yellowstone National Park, often cited for a massive eruption that covered the region in hot ash.
Measurements at Niwot Ridge research station west of Boulder indicate changes to Colorado mountain zones are underway.
Two groups let the U.S. Fish and Wildlife Service know they intend to sue because of the agency’s decision to not offer the plains bison endangered species protection.
A move toward industrial-scale bioenergy using forest biomass could negatively impact ecosystem diversity.
The benefits of releasing captive-bred Mexican wolves into the wild include support of wolf reintroduction efforts in the Southwest and ecosystem balance, groups say.