You have probably noticed it at some point: a small clump of fluff sitting in your belly button. It is not that it looks like ...

Everyone has a belly button. It’s the small fold of skin that formed in your abdomen after the umbilical cord was clipped at birth. Belly buttons can be concave (innies) or convex (outies). ‌ Most of ...

Your belly button carries nearly 200 million years of evolutionary history — and a thriving microbial ecosystem you’ve ...