I have no faith in the current cosmological model of a Big Bang leading to a Big Crunch or a slow death of the Universe. My gut feel tells me that our Universe is perpetual, and I believe that such a Universe can easily be defended as a plausible theory.
There is a simple mechanism in which a perpetual universe can stay eternally "young" by constantly recycling its matter and energy. All that is required is instability in close proximity of equilibrium.
Constantly seeking equilibrium, our Universe will tend toward a certain state. Let us say that this state is the exhaustion of all stars into radiation. But let us further assume that great instability lies very close to the equilibrium state. If the equilibrium state is a Universe full of radiation, we can imagine the instability to be the short circuiting of this radiation.
Whenever radiation becomes dominant, short circuits happen. Radiation is pulled together to form solar systems and galaxies. At the end of the cycle when equilibrium is finally reached, the short circuit brings everything back to the staring point, and because our Universe is a closed system, there is no loss of energy. There is no "friction" to slow down or alter this perpetual recycling, so it will go on for ever.
For such a model of the Universe there is no beginning and there will be no end. Overall, the Universe will always look the same. Everywhere there will be objects of various ages as measured from their re-set, but in truth they are all eternal.
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