You Are a Ship

This is not just about boats. Parts of your body replace themselves at very different rates:

• Stomach lining can renew within days
• Skin cells cycle out over weeks
• Red blood cells last about 120 days
• Bone tissue remodels gradually over years

Some atoms and many cells are replaced over time, while other cell types — including many neurons — can persist for decades. That mixed pattern makes the Ship of Theseus feel personal without needing an exaggerated claim: your material changes, your continuity remains, and identity through change stays philosophy's most intimate puzzle.