Yellowstone National Park's Grand Prismatic Spring, the park's largest hot spring, makes for a stunning photo in this aerial shot.
CNN
Underneath the picturesque Yellowstone National Park, in the U.S. state of Wyoming, is a supervolcano with the potential to change life on Earth.
CNN
Dr Bob Smith believes a supervolcano eruption under Yellowstone would cover the western U.S with ash that would also enter the jet stream potentially crippling air travel and the world's food supply.
CNN
Old Faithful is one of Yellowstone's most popular geological features. Underground is an enormous plume of very hot rock which fuels every bubbling pool and geyser in the park.
CNN
Scientists at the Yellowstone Volcano Observatory at the University of Utah are constantly monitoring the underground supervolcano for ground movements and earthquake activity.
CNN
They measure seismic readings of the frequent earthquakes happening in and around Yellowstone National Park. Earthquakes can be indicators to when the next supervolcanic eruption would occur.
