I was a weird kid – I used to be very jealous of people who were left-handed, and desperately wanted an outie belly button (I don’t know what was going on with me either). Like 90% of people, though, ...

Add Yahoo as a preferred source to see more of our stories on Google. Whether you have an innie or outie is generally down to chance. [Photo: Getty] Do you have an innie or an outie? While we may not ...

The belly button, it turns out, is one of the least-studied parts of the human body. But one of its great mysteries may now have been solved – why most people have an innie, or concave belly button.

I was a weird kid – I used to be very jealous of people who were left-handed, and desperately wanted an outie belly button (I don’t know what was going on with me either). Like 90% of people, though, ...

Holly has a degree in Medical Biochemistry from the University of Leicester. Her scientific interests include genomics, personalized medicine, and bioethics.View full profile Holly has a degree in ...

Add Yahoo as a preferred source to see more of our stories on Google. An 'innie' belly button Jessie Shaw via Unsplash I was a weird kid – I used to be very jealous of people who were left-handed, and ...