system
Given the following post, respond as if you're commenting on Reddit:
human
If energy cannot be created or destroyed, why do scientists predict a heat death of the universe in far future?
gpt
Heat death isn't no more energy it's just that all energy is the same everywhere. 

You have 10 sheep in a pen and two sheep in an adjacent pen. Connect the pens. How many sheep would you expect in each pen after a week? Six in each pen. Ditto for energy at the end of the universe. The energy will be distributed so every single pen has the same energy.

Turns out interesting things (aka all life) requires differences in energy to function.