NEW YORK — When the ancient supercontinent Pangea began to break apart 200 million years ago, it unleashed volcanic hell ... Earth’s magnetic field preserved in volcanic rocks, from CAMP lava ...

What Iceland’s volcanoes are revealing about early life on our planet Speleologists in metallurgical “cooling suits” emerge from the extreme heat of a lava tube formed by the eruption in ...

During a brief but dramatic chapter in Earth's history about ... was first recorded in lava flows and sediment deposits. During this episode, the magnetic field lost much of its strength and ...