You didn't explicitly mention it, but planthoppers use gears (as one example of a "man-made" macroscopic invention) that we then discovered as a locomotion mech

You didn't explicitly mention it, but planthoppers use gears (as one example of a "man-made" macroscopic invention) that we then discovered as a locomotion mechanism in this species within Insecta. Not a perfectly round wheel, but a wheel with teeth. https://www.livescience.com/39577-insects-with-leg-gears-discovered.html https://www.livescience.com/39577-insects-with-leg-gears-dis...