Pee is super cool! It’s 95% water. It’s sterile. And it can be a window into our overall health. But why is it yellow? We asked mechanical engineer Patricia Yang to help us find the answer. Got a Moment of Um question? Send it to us at <a href="https://www.brainson.org/contact">BrainsOn.org/contact</a>, and we’ll help find the answer.

How do bubbles pop?

Moment of Um is your daily answer to those questions that pop up out of nowhere and make you go… ummmmmmm. Brought to you by your friends at Brains On at APM Studios.