Think about it:
Replace every Lego in your model. Is it still yours?
Imagine you build a Lego model. Then, one piece at a time, you swap each brick for a brand-new identical brick. After the last swap, every single piece is different from the original. Is it the same model? Or a different one? An ancient Greek thinker named Theseus asked this exact question about a ship — 2,400 years ago. Nobody has agreed on an answer since.
Why does this matter? ↓
Every cell in your body gets replaced over time. Most of you is brand new every 7 years. So… are you the same kid you were? It's the same puzzle, just with you instead of a ship.
Talk About It Tonight
Are YOU the same person you were five years ago? Most of your cells have replaced themselves.