Physics has a bit of a problem. Stuff that you don’t really think about, like single items moving on frictionless surfaces or two bodies traveling in the void of space, are really easy to explain. Stuff you experience every day, like water dropping or M&Ms spilling on the floor, are incredibly complex. A team of Spanish and Mexican scientists were therefore interested in a problem I bet you’ve thought of: How to perfectly compact a container full of jumbled dice.