The Universe Will Eventually Run Out of Energy

The universe is slowly drifting toward a state of total stillness called heat death. In this future, energy becomes so evenly spread out that no movement, life, or change can ever happen again.

This does not mean the universe becomes freezing cold, but rather that it reaches a state of perfect balance where no work can be done. Think of it like a battery that has completely drained, leaving no way to spark new processes. Once entropy hits its maximum limit, the cosmos effectively hits a permanent pause button. All stars will fade, leaving the universe a dark, uniform void where time loses its meaning.