Ever wonder why urine is yellow? Researchers say they've figured it out.

Ur-ine luck if you've always wondered why pee is yellow. 

Researchers identified the enzyme responsible for urine's color, unraveling a mystery that's puzzled scientists for years, according to a study published Wednesday in the journal Nature Microbiology. 

"It's remarkable that an everyday biological phenomenon went unexplained for so long, and our team is excited to be able to explain it," Brantley Hall, an assistant professor in the University of Maryland's Department of Cell Biology and Molecular Genetics, said in a news statement.