Nature creates round objects all the time (stones in a river, a hedgehog in a ball,...), but the principle of an axle is not found as far as I know.

you are viewing a single comment's thread
view the rest of the comments
[–] 3 points 2 months ago (2 children)

It is the invention of the differential that is the big deal.

You are correct, nature has round things all over the place. It is like the silly joke who is the first dude to eat a crab? They guy who watch a bird do it.

  • source
  • hideshow 2 child comments
  • [–] 9 points 2 months ago (1 child)

    The differential is a relatively new invention if we consider how long wheels have been around. You didn't need a differential for a 1 wheeled hand cart like a wheel barrow nor for a wheeled drawn behind cart like a horse carriage.

  • source
  • parent
  • hideshow 1 child comment