Futurism: Science Explained: Do Atoms Last Forever?
If all mass is turned into radiation, and that radiation is traveling at the speed of light, then the radiation senses no time and space. Isn't that the condition of the big bang? Intense radiation with inflation. But in this case, there is no need for inflation. That is what Sir Roger Penrose postulated in the video embedded in the previous post.
Does time only exist when there is mass?