The wolf population in Yellowstone National Park was essentially wiped out by the mid 1920's. That changed in 1995, when the National Park Service reintroduced them there. So, 20 years later, how has the park's ecosystem responded to the return of the wolves? Watch how #NSFfunded Utah State University wildlife ecologist Dan MacNulty and his team work in partnership with the National Park Service to find out! Fuller understanding of what's happening in Yellowstone could translate to better predat

Scientists have made an important discovery inside the super volcano deep underground at Yellowstone National Park, nearly 2.5 miles down, they found a magma cap which releases pressure and reduces the chances of a tremendous eruption. | CBS Evening News