white dwarfs. Over time, gravity ejects most cosmic remnants into the freezing interstellar space. Notably, neutron stars may collide and make superluminous supernovae. Extraterrestrial life might live around aging white dwarfs, which someday die and become black dwarfs. At some point, the supermassive black hole at the center of each galaxy will suck up all degenerate matter that fails to escape it, a similar process to the fate of the Sun. Theories predict that civilizations could utilize black holes as a source of power and slow down their time to survive the end of the universe. However, if protons are unstable, they begin to decay, and atoms disintegrate, erasing all the remaining degenerate matter in the universe. With protons having completely decayed, the Black Hole Era begins. The universe contains "zombie galaxies" of black holes and light particles lounging around. Finally, binary black holes might come to life, releasing massive amounts of energy as gravitational waves when merging. In the year 159 novemdecillion (159 × 1060), Hawking radiation finally makes the first black holes die. As they explode, they light back interstellar darkness. The universe then expands further by dark energy, which, if it persists at that time as it is now, will cause the universe to expand forever, making it colder, darker, and emptier. Theories predict that civilizations, including humans, could create virtual or real-life universes of their own, looking at the possibility of a multiverse and evolution between universes. However, if escaping the universe is impossible, entropy will destroy the remaining black holes. The last black hole evaporates in the year 15 untrigintillion (15 × 1096), making the universe become "nothing but a sea of photons gradually tending towards the same temperature as the expansion of the universe cools them towards absolute zero" according to Brian Cox. During this time, everything in the universe decays to nothing, making the universe end in the year one googol (10100). When this happens, time no longer has any value (it "becomes meaningless"). After the short credits, a text appears that says "For Ash," the name of Boswell's son, who was born on January 1, 2019. Production Film Production of the film started in summer 2018. On October 9, 2018, Boswell posted on his Twitter account an image of an early experiment of the film: a picture of an animated black hole. The screenshot differs from the final result absolutely: the extremely