In about a year every atom in your body would have been exchanged. Not a single atom in your body resides there forever and there is a 100% chance that 1000s of other humans through history held some of the same atoms that you currently hold in your body.
Just as fascinating, is the fact that about 30% of your body, by weight, is not even “you” (cells without human DNA/RNA), it is a cooperative arrangement of bacteria, viruses, parasites and other welcomed or sometimes unwelcome guests. In fact, just in the case of bacteria, there are 10 times more bacteria cells then human cells in your body:
This leaves one with perhaps a very large philosophical question: " If every atom in our body is replaced each year, who are we if we are not our atoms and we are not our cells? "
