Tag Archives: Underground

Geologists have stumbled on what they call gigantic fortresses lying almost 1,800 miles below our feet in Earth’s mantle. New seismic evidence shows how these subterranean bulwarks are older and tougher than the cooler debris of dead ocean plates that surround them, turning a long‑running mystery into a concrete data story. Each fortress spans an area comparable to …

“Hearst Magazines and Yahoo may earn commission or revenue on some items through these links.” Here’s what you’ll learn when you read this story: Volcanoes are responsible for some of the greatest bouts of biological devastation in Earth’s history. A new study aims to determine whether giant volcanic eruptions are related to BLOBS—mobile basal structures related to well-known large low-shear-velocity …