In this 360° video from the Sierra Nevadas' Long Valley Caldera and Antarctica's Mount Erebus, see how volcanoes belch carbon dioxide and other gases into the atmosphere, which has slowly changed Earth's climate for millions of years.

Learn more by playing NOVA’s Polar Lab: https://to.pbs.org/3aLUMS1 pbs.org/PolarExtremes #PBSPolarExtremes

Production Intern: Shantal Riley Edited by: Arlo Pérez & Lorena Lyon Narrated by: Caitlin Saks Senior Digital Producer: Ari Daniel NOVA Labs Editorial Director: David Condon Music: APM

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