Lots of creatures are able to glow, like fish, mushrooms, fireflies and even some bacteria! This special ability is called bioluminescence and it looks like magic, but it’s actually chemistry. In this episode, we’ll travel to the bottom of the ocean in the ExPLORERR to meet some super spectacular, bioluminescent friends and find out why so many animals make their own light. And we’ll hear from a scientist who uses bioluminescence in cancer research. Plus a brand new mystery sound! This episode is sponsored by: Disney Plus Originals (Disneyplusoriginals.disney.com - Disney Plus Originals' Moon Girl & Devil Dinosaur) Indeed (Indeed.com/BRAINS - Terms and conditions apply. Cost per application pricing not available for everyone.) Thrive Market (Thrivemarket.com/brains - For 30% off your first order, plus a FREE $60 gift.) ***** Do you have your Smarty Pass yet?? Get yours today for just $4/month (or $36/year) and get bonus episodes every month, and ad-free versions of every episode of Brains On, Smash Boom Best, Moment of Um, and Forever Ago. Visit www.smartypass.org to get your Smarty Pass today! See omnystudio.com/listener for privacy information.