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New research has revealed more about what lies beneath this iconic and picturesque national park.
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The discovery - the largest of its kind ever made - could provide the world with enough lithium to build batteries for decades.
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The enormous supervolcano in Yellowstone National Park could erupt with only a few years' warning.
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Scientists have discovered evidence of a 'hot zone' feeding a supervolcano in southern Italy.
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NASA has come up with an ambitious new plan to cool down the supervolcano by using it as an energy source.
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The asteroid impact that wiped out the dinosaurs might have also produced intense volcanic activity.
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The Siloe Patera crater on Mars is now believed to be the collapsed center of an enormous volcano.
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A chamber containing 11,200 cubic miles of molten rock has been found below Yellowstone National Park.
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In the event of an eruption the volcano could spew out 2,000 times the debris of Mount Saint Helen's.
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Scientists investigating what causes a supervolcano to erupt believe that they've found the answer.
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The supervolcano at Yellowstone National Park is believed to be 2.5 times larger than earlier estimates.