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 ...

Introduction Have you ever poured sand out of a bucket or cereal out of a box and noticed it seems to flow' a lot like water? This is because both sand and cereal are granular materials. That means ...