Harenadraco, the sand dragon; Hypnovenator the sleep hunter; and Urbacodon norelli, Norell's URBA-tooth are all recently named troodontids. Plus some new good kid's books and our sixth Di-Know-It-All Challenge.

For links to every news story, all of the details we shared about Tianyuraptor, and our fun fact check out https://iknowdino.com/Tianyuraptor-Episode-507/

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Dinosaur of the day Tianyuraptor, a small raptor from China, with unusually short arms.

In dinosaur news this week:

• The "sand dragon" from Mongolia, Harenadraco prima [sic], is the first troodontid from the Baruungoyot Formation
• There’s a new troodontid dinosaur, Hypnovenator matsubaraetoheorum, found in a sleeping position in Japan
• There’s a new troodontid species, Urbacodon norelli, known for its large unique teeth

This episode is brought to you by Brilliant, the app with thousands of bite-sized, interactive lessons on cutting-edge topics. Anyone interested in paleontology will particularly like their courses in chemistry, which underlie the fossilization process, as well as data analysis, used to model dinosaur populations. Start your 30-day free trial today! Plus, I Know Dino subscribers can get an extra 20% off a premium annual subscription here.

You can win a large Spinosaurus tooth, fossilized leaf, and more by winning our Di-Know-It-All Challenge! Each week from episode 502 to 509 we'll read a puzzle on the show which you can enter to win by answering questions. This week you can enter at bit.ly/dinochallenge507 and if you're a patron you can answer the patron question at patreon.com/posts/110070921. All the rules for the challenge are at bit.ly/dinochallenge24

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