this post was submitted on 18 Sep 2026
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TenForward: Where Every Vulcan Knows Your Name

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[โ€“] Nouvellalia@lemmy.world 10 points 4 days ago* (last edited 4 days ago) (1 children)

So far that we know of, neural cell DNA, tooth enamel, and eye lens crystallines, never have their atoms replaced.

Which is to say that we are a ship of theseus, and a transporter does not kill us. The only reason these atoms are not normally replaced is because there is no natural mechanism to replace them.

Radiocarbon Dating of the Human Eye Lens Crystallines Reveal Proteins without Carbon Turnover throughout Life Lynnerup N, Kjeldsen H, Heegaard S, Jacobsen C, Heinemeier J (2008) Radiocarbon Dating of the Human Eye Lens Crystallines Reveal Proteins without Carbon Turnover throughout Life. PLOS ONE 3(1): e1529. https://doi.org/10.1371/journal.pone.0001529

[โ€“] ignirtoq@feddit.online 4 points 4 days ago

Not sure I would tie my identity to my neuron DNA, tooth enamel, and eye lens crystallines. Definitely agree with you that we are living ships of Theseus. I'm pretty sure there's no natural mechanism to replace those parts because it's really hard, and we work "well enough" without being able to.