“In the grand scheme of things, plate tectonics is a young theory,” says Brian Savage, a seismologist at the University of Rhode Island. “The plate-tectonic theory is 50 or 60 years old. That’s not ...

Earth's fractured outer shell is in perpetual motion. While usually imperceptible to us surface dwellers, these pieces of a rocky jigsaw puzzle are constantly crashing together, diving beneath one ...