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 ...

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 ...

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 ...

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 ...