Chladni figures are patterns that appear on surfaces when they are made to vibrate at certain resonances. It sounds dry, but throw in some sand and just the right frequencies and it becomes an amazing ...

[Mark]’s sand table wisely has a glass top. Most of us have probably seen a video of a sand drawing table at work, in which a steel ball — magnetically-coupled to a gantry under a layer of sand — ...

Can anybody help us explain what caused the phenomenon in this photograph? It was taken on the Sands of Forvie nature reserve in north-east Scotland. The weather was dry, though there had been rain ...