Have you ever seen a tepid cup of coffee getting hot? Or a pile of sand grains organizing themselves into a sand castle? It would be strange, right? But why? The reason is behind one of the most fundamental and general laws of physics: The Second Law of Thermodynamics. Watch this short video to learn more.
This video is part of a series created by Mariona Esquerda Ciutat, a science communicator at the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany. Check out Mariona's other videos below.