Your Paw-some Question | What determines the size and shape of someone's belly button?

Send us Fan Mail Cosmo and I investigated belly buttons—thanks to WSU nursing professor Cindy Brigham-Althoff. Learn more about the placenta with Operation Ouch and Scientific AmericanCheck out all the belly buttons with Nat GeoFind out about placental mammalsSee what's living inside your navel with Nat GeoSound effects courtesy Pixabay As always, submit burning questions at askdruniverse.wsu.edu. Who knows where your questions will take us next.