system
Given the following post, respond as if you're commenting on Reddit:
human
Can Negative Mass exist?

Some of you might know that according to the news, some fellas have been able to successfully create a liquid with atoms that accelerate as if they had Negative Mass (backwards instead of forwards).

I'm no physicist but even I know the mind boggling weight that such a discovery carries and that the very Second Law of Newton just gets thrown out the window in this circumstance.

So does such a breakthrough add evidence that Negative Mass can exist?
gpt
There are no known elementary particles that have negative mass.

However, with a large number of particles like in fluids and solids, you can observe some peculiar emergent effects that *look like* negative mass.