Earth runs on massive amounts of heat, enough to melt iron in the core and create our magnetic field, enough to power the constant movement of plate tectonics. Where all this heat comes from is a mystery...but we're getting closer.

Enceladus is home to one of the solar system's most incredible hotspots, churning out 15.8 gigawatts of power. It's even more proof that there's a liquid ocean hiding beneath the ice...but scientists have no clue what's creating all that heat.

John Denver proclaimed it "almost heaven", but a group of geoscientists are implying it's a little more like the opposite. Most of the rest of the world doesn't think of West Virginia as a hot spot, but it is.