system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Scientifically, what is happening as we die? Are we any closer to stopping/reversing/slowing down the process?

Death is probably my biggest fear. I don't understand it, and the fact that what happens afterwards is pretty much unknown is what really gets me.

So tell me what happens to us during the process.
gpt
your consciousness only exists in your brain. When you die your brain stops working, usually due to lack of oxygen. No oxygen means nothing to burn in your braincells. And then there is nothing. Nothing to worry about.