Decades-old mathematics might finally explain some features of the 'oddballs' of matter: granular materials that sometimes behave like a solid, and at other times flow like a liquid. Strange as it ...

Why does an hourglass use sand instead of water? The Granular Flow Laboratory Project explores this concept by designing a transportable display demonstrating granular vs. fluid flow. Three ...

Introduction Summer is a nice time to take a stroll at the beach and walk barefoot along the shoreline. While doing that, have you ever looked at your footprints in the wet sand? If so, you might have ...