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

Scientists have made an, er, interesting discovery.

If you have a pet cat or dog, it’s belly button isn’t easy to see. It’s a subtle scar on its tummy, covered by fur. But humans have obvious belly buttons. They come in different sizes and shapes. I ...

Scientists had long speculated that egg-laying dinosaurs would have an umbilical scar, but this study is the first to find evidence of one. (Pictured: artist representation of a Psittacosaurus and its ...