We were taught is school that we are breathing in molecules from Caesar’s last breath, if this is true it should hold true for every person that ever lived, is our atmosphere really that fluid?

Question

We were taught is school that we are breathing in molecules from Caesar’s last breath, if this is true it should hold true for every person that ever lived, is our atmosphere really that fluid?

In: 27

Answer 1

This is true for every person that ever lived, and also for their every breath, not just the last one. Gases spread and mix very easily. One “breath” of air contains more than 10^22 molecules.