The idea for this track came from watching on YouTube melodysheep's https://soundcloud.com/melodysheep excellent "Timelapse of the Future: A Journey to the End of Time."
https://www.youtube.com/watch?v=uD4izuDMUQA
For more context I recommend reading about 'The Five Ages of The Universe' by Professors Fred Adams and Gregory P. Laughlin:
https://en.wikipedia.org/wiki/The_Five_Ages_of_the_Universe
In my track I focus on the fourth age of the universe - the black hole era. The preceding Degenerate Era starts roughly 100 trillion years from now with the death of the last normal star (and no more stars are born), and all that remains is brown dwarfs, white dwarfs, neutron stars and black holes.
After an unimaginably vast length of time only black holes remain and the black hole era begins. After an even longer stretch of time all black holes will evaporate due to Hawking radiation and the universe enters the Dark Era during which the Big Freeze or Heat Death of the universe will eventually occur...and time will cease.
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Image taken from:
https://commons.wikimedia.org/wiki/File:Black_Holes_-_Monsters_in_Space.jpg