Scientists studying six North American volcanoes situated along the continent’s Cascade Range have found active magma underneath both active and dormant volcanic sites. Previous research has suggested that volcanoes lose significant magma volume when they erupt, and any remaining magma dissipates over time. The scientists behind the discovery argue that a better understanding of the conditions underneath volcanoes could answer several enduring questions about their lifecycles, including whether or not all dormant volcanoes contain pools of magma underneath. The researchers also believe a better understanding of these magma-filled chambers could help inform efforts to prepare for potential volcanic eruptions. Even...