When it comes to intestines, it sure seems like two are better than one. I asked my friend Franck Carbonero why that is. He’s a microbiologist at Washington State University. He studies the bacteria ...

The small intestine is an important part of the digestive system, connecting the stomach to the large intestine. It stretches about 20 feet and coils to fit in your abdomen. The small intestine is ...

This story is part of a series exploring human anatomy and physiology complexities. Each story in this collection showcases discoveries reshaping our understanding of the body's inner workings, ...