A new set of rock dates have pushed volcanism back into the debate over the extinction of the dinosaurs.
The iconic Tuolumne Meadows, in the high Sierra, is a geological puzzle. A newly published study traces the roots of the meadows to an incident deep in time and deep below the ground.
Data about volcanic eruptions and industrial pollution are encoded in great works of art.
The obscure rare-earth metals turn out to be unexpectedly essential to life in hot volcanic mud--and probably elsewhere.
Listening to the sped-up vibrations of earthquakes offers a tantalizing glimpse of the deep physics behind seismicity as well as everyday sounds.