4 ms·

Also, weight! Bones are not weightless but steel...

• pmlnr 9y ago
  Steel/metal foam is surprisingly light, a bone-fabric like structure of metal would be pretty light as well.
  • jablan 9y ago
    Also, steel pipes, as on bicycles.
    • yoz-y 9y ago
      What about joints? Wouldn't harder bones wear them more quickly?
      • anotheryou 9y ago
        this was my main thought, but maybe foamy constructions can stay springy