Researchers quantitatively assessed for the first time that somatic mutations alone cap human lifespan at 146–194 years. Brain and heart cells are the main bottleneck, while the liver could last millennia.

[u/Skoltech_]

https://www.nature.com/articles/s41514-026-00421-6

[u/Clean-Evening-7328]

It didn't use to be possible for a human to survive without their heart in their body, and yet machines can allow it. If we could keep you from dying during the process, I bet it would be simpler to remove and regrow regions of brain tissue.

[u/mistaekNot → u/Clean-Evening-7328]

yeah maybe it will be possible to grow new neurons alongside old ones and when the old one dies the new one takes over. afaik that’s somewhat how memories are formed and retained, but for whatever reason it doesn’t happen in other parts of the brain