When we take a stroll on the beach, we walk on the sand without any trouble. The sand appears solid and is difficult to compress. When we put the same sand grains in an hourglass, they behave very ...

Historically high fuel prices have forced Americans to completely re-think their driving habits, from the type of vehicles they drive to how they go about their daily errands. Likewise in the business ...

Researchers have taken a close look at the flow of materials that have both liquid-like and solid-like states, such as toothpaste, mayonnaise, and ketchup, using both simulations and experiments.