Salt: The Rock That Flows

Salt is a substance with many uses, including as condiment for our food. also rock, and it can be found underground in places around the world. What makes rock salt fascinating that, over hundreds to millions of years, that flows! Over long periods time, behaves bit like honey—like thick, viscous liquid. This means change shape faster than other rocks squeezed surface toothpaste out tube. flow ice does glaciers. Understanding how changes important because often used store useful or dangerous substances, such petroleum nuclear waste.