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.
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.
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