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.

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[–] 1 point 2 months ago*

also a lot of animals like going downhill in unconventional ways, such as this one:

(should be a GIF file)

alternative image link:

https://media.tenor.com/aSBOSQUUzhIAAAAM/gliding-penguins-continent7.gif

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