How can a sourdough starter be 100 years old?

Question

I keep seeing sourdough starters all over socials. How can sourdough starters be many years old. Don’t you need to use the starter to make the bread? ELI5!

In: Other

Answer 1

Theseus Paradox, yo! Is it 100 years old or has it been replaced bit by bit over time? Mind blown…