The curious truth about belly button fluff - BBC Future
What Kinds of Animals Have Bellybuttons? | Kids' Animal Station
The innies and outies of belly buttons | Brains On
Alberta Bats on X: "And the answer to Quiz Question #1 from yesterday is: YES! #BatBellyButtons #YouBetcha #AlbertaBats (note: red arrow points to bellybutton, also note, likely classified as an "outie") https://t.co/fNQA9i0mGf" /
The Chicken Chick - CHICK FACTS: Baby chicks have belly buttons, just like human babies. The 'string' you see in this photo is the equivalent of an umbilical cord. If you see