3 ms·

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