Discover how liquid in a tumbler forms a vortex, balancing rotation, pressure, and gravity in a funnel-shaped spiral.

LAKE DELTON, Wis. -- In a wooded ravine tucked away from the water parks, restaurants and mega-resorts that dominate this tourist town, a piece of history is quietly dying. After more than half a ...

Have you ever thrown your spare change into a coin vortex like the one we used to have in the gift shop at ECHO? When you put a coin in this, the coin spins around and around until eventually it ...