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 ...

In people and other mammals, the belly button is a scar that remains at the point where the umbilical cord was connected to the fetus' body. Even though dinosaur embryos weren't attached to an ...

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 ...

Forget dinosaurs engaged in vicious combat. Put aside terrifying fangs and claws. Scientists have discovered a softer side to dinosaurs: the reptilian equivalent of a belly button. For the first time ...

Add Yahoo as a preferred source to see more of our stories on Google. When it comes to body parts, the belly button doesn’t usually get much attention. Yet this often-overlooked little spot is a ...

A herbivorous parrot-beaked dinosaur that lived in what is now China 130 million years ago may have had the reptile equivalent of a mammalian belly button. “I’d ...