Ever been mesmerized by the swirling colors of Grand Prismatic Spring and wondered what fuels that otherworldly boil? It turns out that beneath the wild expanse of Yellowstone National Park lies one of the most closely watched volcanic systems on Earth.

A University of Utah professor and his team found a new way to look at the region around the Yellowstone volcano and its conditions underground.

A recent study discovered the exact location of the Yellowstone supervolcano's magma cap -- and hints at when it may erupt.