Hidden in the Pacific, two very different volcanoes are forcing scientists to rethink what counts as “biggest.” Tamu Massif, a shield-like giant buried beneath the northwest Pacific, spent years ...

Echinus Geyser in Yellowstone National Park, a rare acidic geyser and the largest in the world, has recently been observed actively erupting again for the first time since 2020.

Schematic illustration of the oceanic plate beneath the Ontong Java Plateau inferred from seismic wave analyses. High-frequency seismic observations indicate that the plate has a composite structure ...