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This would be a valid comparison if the bridge healed itself. Similarly, walking damages your leg bones due to the impact / stress of gravity - but your bones
by Groxx 13y ago
This would be a valid comparison if the bridge healed itself. Similarly, walking damages your leg bones due to the impact / stress of gravity - but your bones actually strengthen due to use, as they are continuously being rebuilt, and they adapt to such changes. Too much can definitely cause permanent damage, but below that point it's not necessarily cumulative.
- vacri 13y agoBridges generally do heal themselves - they have a small colony of symbiotic (parasitic?) humans that take care of them. Some bridges fall into disrepair because their symbiotes have been compromised.