The Ring of Fire: Earth's Fiery Vents

Seventy-five percent of the world’s active volcanoes are trapped in a single belt called the Ring

of Fire. It is actually terrifying when you realize these aren't just mountains,

but vents letting the Earth release pressure from deep underground. We named them after

the Roman god of fire for a reason. You have got the flat Shield volcanoes, the explosive Cinder

Cones, and the massive Composite ones like Mount Fuji. If one hasn't erupted

in ten thousand years, we call it inactive, but don't get too comfortable because

that molten rock is always moving beneath your feet.