Sand in an hourglass might seem simple and straightforward, but such granular materials are actually tricky to model. From far away, flowing sand resembles a liquid, streaming down the center of an ...

The technology used to predict sand and dust storm (SDS) severity has for decades systematically overestimated when and where sediment is transported across Earth's surface, a new study shows.

Over the past few years, Joep van der Zanden has created perfectly identical waves – 40,000 times – in a large ‘wave flume’ (channel). Using advanced measurements, he investigated the effect of these ...