We all know that our urine is yellow, or at least, it should be.

While we have known for some time that it is urobilin that's responsible for the yellow pigment, it was unclear what was responsible for the urobilin's production - that is of course, until very recently.

Brantley Hall, Assistant Professor in the Department of Cell Biology and Molecular Genetics at the University of Maryland joins Jonathan to discuss.

Also joining us for this week's installment of Newsround is Fergus McAuliffe, Education, Public Engagement, and Communications Manager at iCRAG & Dr. Oran Kennedy, Associate Professor in Anatomy and Regenerative Medicine at RCSI.