Kids News Explainer: What is a belly button and why does it look like it does?
By A Mystery Man Writer
Why Is My Child Obsessed With Their Belly Button?
A father's tears for the pain of endometriosis, Letters
5 Strange Facts About Belly Buttons
Digital Story Time: Where Is Baby's Belly Button
New evidence suggests early puberty can be triggered by pandemic
Navel - Wikipedia
Innies, “Outies and Other Belly Button Facts
Bellybutton challenge: This is damaging.
Kids News Explainer: What is a belly button and why does it look
Why do we have our belly button?
8 Weird Things You Didn't Know About Your Belly Button
What's that stuff in your bellybutton? Science has the answer.