“Why is it said that universe will die? Even dark universe will be universe, a different unknown one. Universe will never die, only forms of energy and matter will change.“
(My comment was as simple as this.)
There are hundreds or thousands of elements that exist in the universe that human beings are still unaware of. There are many types of energies and rays about which human beings are still unaware. Those elements and energies will take billions of years to exhaust, even then the reactions f their exhaustion may produce new kinds of particles which may make new unknown types of objects in the universe.
Even if all the light and heat gets exhausted, the frozen universe will still be there EXISTING in that dark state. It will not vanish anywhere as matter and energy change their form but they do not stop existing. Moreover, it’s highly unlikely that there will be absolutely no activity in the universe.
This was my stance but a Low IQ dumbass was very adamant at the death of the universe and was tagetting my intellect n knowedge about the cosmos while having incapacity to understand even the basics himself.