What theories do we have that point to the ultimate fate of the universe being a Heat Death?

Answer 1

Heat death????
excuse me as we see the temperature of the universe is continuosly decresing from the time of big bang so the question of heat death does not even arise!
in the first 10^-43 seconds the temperature droppes over a million degrees and over the next 3 seconds of the big bang it dropped to another million degrees and now after 12 billion years its dropped toonly a few degrees above 0

Answer 2

All the theories involving heat death require the expiation of the universe to stop or reverse so in order for heat death to occur there needs to be enough mass in the universe to make it flat or closed. This allows all parts of the universe to have some kind of contact with each other (light can go form on end to the other) so the universe can become homogenous (all the same temp.) The best book I’ve come across that has to do with possible ends of the universe in The Five Ages of the Universe by Fred Adams and Greg Laughlin.

Answer 3

Who is to say that something won't pop into existence during the expansion of the Universe that keeps a "Heat Death" from even occurring? A Big Bang, or, an infinite number of bangs inside of "the" Big Bang, so to speak.

Answer 4

Right now the research supports a view more in favor of a total freeze-out. In 1997, Saul Perlmutter (and colleagues) discovered that the universal expansion is--very unexpectedly--accelerating, not steady state and not slowing (one of which is what they had sort of expected). So, we're flying apart faster and faster, decreasing the universal energy density (heat) so that space will gradually become colder.

Answer 5

Nothing. Except your wild imagination.