According to some, the super-volcano at Yellowstone National Park in USA is long overdue an eruption... and when it does blow, it could trigger a global disaster on an apocalyptic scale! But how much of the legend surrounding Yellowstone is true? Should we really be worried about it erupting sometime soon? And will it really threaten mass extinctions when it does? In this video, Unveiled explores this iconic volcano to ask; What if Yellowstone erupts?

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