Stone steps erode with every footstep, leading to indents over time, right? But other things seem to erode on their own through time alone, so what causes that? Wind and rain? Would it therefore be correct to say that anything, if subjected to constantly running water, loses a few atoms every second and would eventually erode? Would this mean nothing is technically 100% waterproof? Or can things erode on their own without an external force? Thanks!
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Entropy.
Everything in the universe is subject to entropy. i.e. moving from a state of higher energy to a more settled down lower energy state.
This is true for sub atomic particles as well as macro particles like sand, rock etc.
Erosion is just an act of entropy.
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