Do you know why your urine is yellow? Thanks to some guy named Billy Rubin.

That is, the heme groups of the red blood cells’ hemoglobin are degraded upon cell death/old age to a substance called bilirubin. Bilirubin is yellow in color, and an excess buildup thereof is an indicator of diseases like jaundice. In addition, Billy-Boy lends color to your mellow yellow.

Thanks, Billy. Without you, life would be a lot less colorful.