Hey guys, today I found a great thought experiment to prove that time can't exist without mass and motion. It can be found by proving photon's rest mass = 0. I don't know the actual derivation. So, I have made my own derivation (this is the one I made to prove photon's m = 0 to my friend). Let's start: E=mc^2 (Rest energy equation) E/c^2=m=0 (To prove) We know that c^2 is a constant so if we want to prove m=0, we will have to prove E=0. Let's take another formula: E=hv So, we can prove it by this equation. As we are taking the photon to be at rest, there is no frequency at rest. It will have no frequency. So, we will get E=h*0=0. Putting it in the previous equation, we get m=0. That's how I proved it. But today I thought that in this way everything at rest will vanish from the universe. Okay let's take this experiment. Suppose we stop every matter in the universe. Then everything will vanish according to the above proof. So, anybody outside the universe will never be able to sense that there's a thing like time. And this state of stopping everything can be achieved by stopping time. Everything will come to rest and will vanish from the universe. Hence, we can derive that mass and motion can only exist when time exists or conversely time only exists when mass and motion exist. If time exists and mass and motion don't exist, then we can never feel time. We get that feeling when anything comes into motion. So, both are true. Thouhts please.