Krumplee
the heat death of the universe
A lot of interesting speculative theories as to what this means and what it might bring. I find these topics incredibly interesting. I like the loop theory a lot: That the "nothing" we believe existed before The Big Bang is the result of inflation, and expansion of the universe combined with the heat death of the universe making it so that we "think" the Universe is empty, except all matter has escaped the scope of our visible universe and there's no thermodynamic radiation left within it. (edited)