How do mood rings work?

<p>Have you ever heard of a mood ring? It’s a little piece of jewelry that supposedly tells you what kind of a mood you’re in. But how the heck can it know? We asked scientist Edwin Thomas to help us find the answer.</p><br><p>Got a question that’s getting you in the <em>mood</em> to learn? Send it to us at <a href="https://www.brainson.org/contact">BrainsOn.org/contact</a>, and we’ll help w-<em>ring</em> out an answer.</p><p>See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.</p>