[dweinus]

If you were to pull a random cell from your body, there's a 90% chance it doesn't contain human DNA: https://www.scientificamerican.com/article/strange-but-true-...

[roncesvalles]

A bit clickbait-y. Do you consider your digestive cavity a part of your body or is your body all the stuff around it?

[gnu8]

Maybe that statement should come with an explicit topological constraint on the meaning of “inside” the body. Viewed as a donut, gut contents would be considered “outside.”