Super VolcanoesVolcanoes are capable of acts of pyrotechnical prowess verging on magic: they spout black magma more fluid than water, create shimmering cities of glass at the bottom of the ocean and frozen lakes of lava on the moon, and can even tip entire planets over. Between lava that melts and re forms the landscape and noxious volcanic gases that poison the atmosphere, volcanoes have threatened life on Earth countless times in our planet's history. Yet despite