system
Given the following post, respond as if you're commenting on Reddit:
human
What would happen to matter at or below absolute zero?

Does it cease to exist, or does it do something cool and unexpected?
gpt
Absolute zero is the point where molecular movement is at its lowest energy. Different materials will react differently, but in general, absolute zero is distinguished because as little activity as possible is happening at the molecular level. It can't ever be zero energy, thanks to quantum mechanical effects.