Did dinosaurs roar? Or meow? And how do we know? Paleontologist Julia Clarke stops by to talk about sounds T-Rex might’ve made. We know a bit more about other dino sounds, and dinosaur expert Riley Black fills us in on those. Plus, a game about dinosaur names, and a look at how dinos might’ve moved with paleontologist Jingmai O’Connor.

Stick around for the mystery sound, and a Moment of Um that answers this head-scratcher: How does hair dye work?

This episode was sponsored by:

Sun Basket (sunbasket.com/brainson promo code: brainson)

Mathnasium (mathnasium.com)

FDA (fda.gov/feedyourmind)