Ask HN: What would you improve about human body?

Make the lower back more resistant to chronic injury.

And maybe some sort of "steroid" release with no negative side effects. To improve regeneration. Steroids are a "Jesus" level miracle of medicine. They have literally cured the blind. If this sort of regeneration was built into our bodies it would be pretty cool.

Its output.

Here's an interesting conversation about extending humans with technology in general:

   - https://www.youtube.com/watch?v=ZrGPuUQsDjo

It would be cool if we kept regenerating teeth throughout our lifetime, like sharks.