What is sand made of? And where does it come from? ⏳ | Brut nature

Granular materials are everywhere - in the soil, sand, and gravel we live on, the grains and flour we use in cooking, and the powders we use for medicine. But very little is known about how they move, flow, and interact with their environment. Watch as recently tenured Associate Professor Ken Kamrin explains how his model of granular material flow could impact how we interact with everything from sand and soil to pills and industrial materials. | MIT Mechanical Engineering