“There are more molecules of water in a cup of water than cups of water in all of the world’s oceans.
This means that some of the same molecules in every cup of water you drink passed through the kidneys of Genghis Khan, Napoleon, Abe Lincoln or any other historical person of your choosing.
Same goes for air:there are more molecules of air in a single breath of air than there are breaths of air in the Earth’s atmosphere.
Therefore, some molecules of air you inhale passed through the lungs of Billy the Kid, Joan of Arc, Beethoven, Socrates or any other historical person of your choosing”. ~ Neil deGrasse Tyson