Instead of digging for metals, we could extract them from salty, subterranean water.
Scientists track down a puzzling early burst of oxygen on Earth.
ISS astronauts and NASA satellites capture amazing photos of the Raikoke volcano eruption.
A network of devices called MERMAIDs is taking seismographs where they've never been.
The eruption quickly killed those caught in its intense wake.
Do volcanoes contribute a significant amount of CO2 to the atmosphere compared to humans?