3 ms·

Not sure if any creature has evolved ball bearings…

• xyzzyz 5y ago
  That part is easy, actually: make the bearing surface alive, and regenerate it upon wear. It might exude some lubricant too while we’re at it, should not be hard to evolve.
  • disparate_dan 5y ago
    If you can excuse the overt sexuality of his work, Piers Anthony depicted an interesting alien race of beings with a biological ball-bearing method of propulsion in one of the Cluster series books - I forget the title.