Why Does Time Move Forward?

Imagine your favorite toy room. When you are playing, toys are scattered everywhere. It is easy for them to stay messy. But if you leave the door open and nobody cleans up, do the toys jump back into neat piles on their own? No! They stay messy.

This happens because there are many more ways to be messy than to be tidy. In physics, this idea is called entropy. Nature likes messy things because there are so many versions of messy!

Think about a glass falling and shattering on the floor. You see the pieces scatter. Now imagine watching that video backwards. The shards jump up and form a perfect glass in your hand. It looks weird, right? That is why we know time is moving forward! The world goes from order to disorder.

If you put an ice cube in warm water, it melts. You never see the water freeze into a cube by taking heat away. This push towards disorder is like a invisible wind blowing time in one direction.