Time is something humans are obsessed with. Probably because we have a finite amount of time in our lives, before our bodies inevitably give out on us. Yet if there's one thing we've learned about the universe, it's that symmetry is very much at play in physics. According to Dr Joan Vaccaro, time also follows a certain symmetry. Although it's difficult for us to test this, since we may only experience the asymmetry of time.
It's actually pretty simple. Thanks to what is known as T Violation, we experience time moving forward. Theoretically speaking, time should also have a function of moving backwards. That is if symmetry really is a universal rule. Putting aside that we can only experience one direction of time, Dr Vaccaro breaks the laws of physics using math to predict what that symmetry would look like.
Without T Violation, time would stand still. We wouldn't exist in the fashion we know today. in fact, without T Violation, objects can be placed in time, much in the same way we place objects in space. For example:
Let's say you had a cup of coffee this morning. Removing T Violation would mean that the cup of coffee would no longer exist in the morning, it would simply exist as an object. You could place that cup of coffee at night, much in the same way you place it on your table. That would also mean that we wouldn't experience time in the way we do now.
"[The cup] just exists at one place in space and one point in time. There is nothing unusual about being at one place in space, but existing at one point in time means the object would come into existence only at that point in time and then disappear immediately.
"This means that conservation of matter would be violated. It also means that there would be no evolution in time. People would only exist for a single point in time -- they would not experience a "flow of time."
This explains why the Big Bang launched us forward in time, as well as space. We're finally starting to understand the physics behind a concept we have struggled to fully understand. Yet it still raises more questions. What would time in the opposite direction look like? Do other universes exist without time? Can this explain why superposition exists in the fashion it does?
Only time will tell!