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)

When you imagine the sound of a dinosaur, you probably think of a scene from the Jurassic Park movies. How do sound designers make these extinct creatures sound so believably alive? And what does modern paleontology tell us about what dinosaurs REALLY sounded like? Featuring Jurassic World sound designer Al Nelson, and paleontologist Julia Clarke.Twenty Thousand Hertz is produced out of the studios of Defacto Sound and hosted by Dallas Taylor. Follow Dallas on Instagram, TikTok and LinkedIn.Watch our video shorts on YouTube, and join the discussion on Reddit and Facebook.Become a monthly contributor at 20k.org/donate. If you know what this week's mystery sound is, tell us at mystery.20k.org. Discover more at lexus.com/curiosity.Episode transcript, music, and credits can be found here: https://www.20k.org/episodes/tyrannosaurusfx Learn more about your ad choices. Visit megaphone.fm/adchoices