Yellowstone's supervolcano appears to have a magma cap that vents pressure and reduces the chances of a massive eruption ...

Recent flybys of the fiery world refute a leading theory of its inner structure — and reveal how little is understood about ...

For decades, scientists knew magma was simmering beneath the earth at Yellowstone National Park. A team of researchers ...

Learn how a new instrument will increase the telescope’s ability to spot sunspots in unprecedented detail.

Ever been mesmerized by the swirling colors of Grand Prismatic Spring and wondered what fuels that otherworldly boil? It ...