Your body breaks constantly in minor ways, yet it's automagically repaired to a degree. This evolved naturally, but after sufficient breakthroughs in material s

Your body breaks constantly in minor ways, yet it's automagically repaired to a degree. This evolved naturally, but after sufficient breakthroughs in material sciences we could evolve/design materials that are indestructible. If you haven't already, give Rendezvous with Rama a read.