Travel around the globe, and below its surface, to plumb the mysteries of the always-fascinating volcano. From gorgeous, pyrotechnic lava floes on Hawaii to awe-inspiring mushroom-clouds, humans cannot help but be fascinated by the earth-shaking grandeur of volcanoes. For four billion years, volcanoes have impacted life on earth. Empires have been destroyed, civilizations decimated – not to mention the possible extinction of dinosaurs and spurring of Ice Ages. And, like tuning a car engine by measuring its emissions, we can learn how our planet works by measuring the elements emitted from its diabolical vents.