00:00A volcano erupts and launches material hundreds of miles into space.
00:03This isn't happening on Earth.
00:05It's happening on a moon orbiting Jupiter.
00:08Io is constantly squeezed by Jupiter's gravity.
00:11Deep inside, that pressure generates heat,
00:14melting rock into magma and fueling powerful eruptions.
00:18Io is the most active world known.
00:24A moon can become a world of fire.
