Life on a human body – Part 2


Terre Haute, Ind. (WTHI) – There’s a lot of bacteria “in” and “on” your body that you would never expect to coexist with you. From your hands to your ears, bacteria grow everywhere.

There are so many bacteria on your body that it trumps the amount of people on earth. In fact, “it is more than that. There is more life on your body than 100 galaxies of stars,” explained Peter Coppinger, PhD, Associate Professor of Biology at Rose-Hulman.

Experts say, “we are loaded with [bacteria], all of us, and it sounds like it might be scary but it is completely natural,” said Coppinger.

Not only is it normal for you to be covered in bacteria all over your body but some of it is also helpful

“A lot of the bacteria that lives on your skin and live in your hair, they do no harm to you at all. Some of those bacteria are good for you, it helps you create vitamins.”

Sometimes not so much, “of course there are some bacteria, like ones that live in your mouth that can cause cavities,” explained Coppinger. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you confirm your email address and acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others and keep the conversation on topic and civil. If you see an inappropriate comment, please flag it for our moderators to review.

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