But Gavassino took them on. The new study tackles these questions by focusing on the thermodynamic arrow of time — the familiar one-way direction in which events unfold, food spoils, and we all age.

The arrow of time is a concept that is fairly important in science. More often in physics, we talk about the thermodynamic arrow of time. In all isolated systems, entropy increases as time goes on.

According to Sean Carroll, the most mysterious thing about time is its direction. This mystery arises from the fact that the known fundamental laws of physics are time-symmetric: by themselves ...