James O'Brien's Mystery Hour

Plus a hatchling Allosaurus that was partially digested before fossilizing, T. rex tooth marks on Edmontosaurus, reviews of Netflix's The Dinosaurs & The End of Oak Street, and more.For links to every news story, all of the details we shared about Stygivenator, and our fun fact check out https://iknowdino.com/Stygivenator-Episode-576/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Stygivenator, a fragmentary tyrannosaur that for many years was known as "the Jordan theropod".In dinosaur news this week:There’s a new enantiornithean bird, Chromeornis funkyi, and it choked to death on rocksThe shape of gastroliths can help us figure out how dinosaurs digested their foodPaleontologists found evidence of a poor hatchling Allosaurus being eatenTooth marks on Edmontosaurus bones likely show a T. rex was feeding or scavenging on itReview of “The King and the Dragon” By S. Hunter AllredReview of Netflix's "The Dinosaurs" (link in show notes has…

Every megaraptoran dinosaur that has been described. Plus some that aren't officially named like the "Lightning Claw" from the opal fields of Australia. And many that have been given other classifications—like a potential giant compsognathid.For links to every news story, all of the details we shared about AniksosaurusAndAoniraptor, and our fun fact check out https://iknowdino.com/AniksosaurusAndAoniraptor-Episode-575/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Aniksosaurus and Aoniraptor, two predators on the smaller side for the Cretaceous. Aniksosaurus was probably under 10ft (3m) long and under 100lb (45Kg). Aoniraptor was twice as long and heavier, but it had a lot of air spaces in its bones to make it as light as possible..Megaraptorids could be closely related to Tyrannosaurs, but they had lighter skeletons and large impressive hand claws.The Meagaraptorans discussed in this episode:Megaraptor: The original…

Episode art of Gongshuilong fanwei by Joel Lee joelleeart.comThe new hadrosaur Gongshuilong had an amazing, and tall, tail; A new close relative of Parasaurolophus with a large head crest; And a "hidden hadrosaur" Kryptohadros from Romania; Plus the PBS Eons team join to discuss their new series on the Permian and the Great Dying that started the Mesozoic.For links to every news story, all of the details we shared about Shamosaurus, links from Blake de Pastino, Kallie Moore, and Gabriel-Philip Santos, and our fun fact check out https://iknowdino.com/Shamosaurus-Episode-574/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Shamosaurus, a medium-sized ankylosaur.Interview with Blake de Pastino, Kallie Moore, and Gabriel-Philip Santos, three of the hosts of the YouTube channel PBS Eons, and their new six-episode series from PBS Digital Studios and Complexly, titled Eons: Life and Death on Pangea, explores the “Great Dying”In dinosaur news…

From tiny Triassic taxa to stupendous "snake-necked" sauropods. We cover eight brand new named dinosaurs—And they are all sauropods (with one sauropodomorph).For links to every news story, all of the details we shared about Venenosaurus, and our fun fact check out https://iknowdino.com/Venenosaurus-Episode-573/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Venenosaurus, a small sauropod whose name means "poison lizard".In dinosaur news this week:A new small sauropodomorph from Zimbabwe, Musango matusadonaensis, that weighed as much as two ostrichesA sauropod in India, Ceratocaudia antiqua, was old for a neosauropod (Early/Mid Jurassic) but also old as an individual (with arthritis)A new small titanosaur from Uruguay, Mesetasaurus protectorA new Moroccan titanosaur, Phosphatotitan khouribgaensis, looked a lot like a miniature PatagotitanThere’s a new Argentinian sauropod, Bicharracosaurus dionidei, the "big animal lizard"A new "snake…

Joschua Knüppe returns to discuss working on dinosaur documentaries, paleoart (from press releases to murals), and many more projects. Plus the new raptor, Kank australis, which may have been an active fisher.For links to every news story, all of the details we shared about Oohkotokia, links from Joschua Knüppe, and our fun fact check out https://iknowdino.com/Oohkotokia-Episode-572/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Oohkotokia, an armored ankylosaur that lived alongside tyrannosaurs like Albertosaurus and Gorgosaurus.Interview with Joschua Knüppe, a paleoartist, and host of Paleostream on Twitch. He was also the scientific advisor for Netflix’s The Dinosaurs, which came out earlier this year—and we talked to him in episode 403, about the graphic novel, Europasaurus: Life on Jurassic IslandsIn dinosaur news this week:There’s a new unenlagiid dinosaur, Kank australis, that seems to have adaptations for fishing (and…

Lindsay Graham from History Daily explores the human side of two topics we often discuss on the show: extinction and volcanic eruptions.On June 3, 1844, after becoming collector’s items for being a rare species, the last pair of great auks is killed by fishermen.On August 26, 1883, a volcano explodes on the island of Krakatoa, sparking one of the deadlest natural disasters in history.Go to HistoryDaily.com for more history, daily.Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Tyrannosaurus hatchlings; Tyrannosaurus took 40 years to reach full size; Some dinosaurs grew really fast and some were incredibly slow; Growth affects how much dinosaurs need parental care; A listener question about how sauropod diets changed as they grew; And a whole lot more dinosaur growth researchFor links to every news story, all of the details we shared about Tambatitanis, and our fun fact check out https://iknowdino.com/Tambatitanis-Episode-571/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Tambatitanis, a titanosauriform from Japan named after the friendship between the two people who found the dinosaur.In dinosaur news this week:There’s a new titanosauriform dinosaur, Dasosaurus tocantinensisWhen estimating how dinosaurs grew, some models may be missing important data pointsDinosaurs were likely thicker and heavier than previously estimatedHow much did climate affect dinosaur body size evolution? It’s hard to sayScans of…

This episode was previously released to our patrons on www.patreon.com/iknowdinoIf you want to hear more episodes like this (and get new content every week) join us at patreon.com/iknowdinoIf we reach 1,000 patrons by the end of August we'll do something special to celebrate! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Bird expert Daniel Ksepka joins us from the Bruce Museum to discuss some of the most interesting extinct birds, dinosaur brains, and much more. Plus the new sauropodomorph Xiangyunloong with an extra sturdy tail.For links to every news story, all of the details we shared about Brasilotitan, links from Daniel Ksepka, and our fun fact check out https://iknowdino.com/Brasilotitan-Episode-570/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Brasilotitan, a squared jawed titanosaur from (you probably guessed) Brazil.Interview with Daniel Ksepka, a vertebrate paleontologist who specializes in birds. His main research is on penguins, though he has studied everything from turkeys to albatrosses. He is also a research associate at several museums and curator of science at The Bruce Museum in Connecticut—an art and science museum that has an exciting exhibit coming up about Earth’s mass extinctions.In dinosaur news this week:There’s a new…

A new hadrosaur dinosaur mummy includes "cutaneous spikes" that would have given its skin a thorny texture. Plus Tara Tassone joins to discuss making our Dinosaur Rookie Cards and designing our new logo (and I Know Paleo logo).For links to every news story, all of the details we shared about Atacamatitan, links from Tara Tassone, and our fun fact check out https://iknowdino.com/Atacamatitan-Episode-569/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Atacamatitan, one of the most complete titanosaurs found in Chile.Interview with Tara Tassone, a graphic designer and illustrator. She's a graphic designer for the Mariners’ Museum and Park in Virginia. She also designed our new Dinosaur Rookie Cards. Follow her on instagram @t.n.t.design and check out her etsy shop Feather and Fang Studio.In dinosaur news this week:There’s a new hadrosaur mummy featuring the prickliest skin of any dinosaur found to date—the new species Haolong dongi Our…

From the smallest ones (birds) to the largest (tyrannosaurs) and in between. The evolution of theropods, an extra large tyrannosaur, more evidence that Nanotyrannus is valid, two new small theropods (enantiornithine birds), and much moreFor links to every news story, all of the details we shared about Avimimus, and our fun fact check out https://iknowdino.com/Avimimus-Episode-568/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Avimimus, the bird mimic of bird mimics.In dinosaur news this week:A new Early Jurassic theropod skeleton gives more insight into how theropods evolvedThere’s a new enantiornithine, Plumadraco bankoorum, and it had really long tail feathersThere is a new enantiornithine, Gorgonavis alcyone, and it had a long beakPaleontologists found an extra large tyrannosaur shinbone in New Mexico, which may show Tyrannosaurus evolved in North AmericaA study of the tiny hyoid bone (in the mouth) in Nanotyrannus supports that it…

Spinosaurus mirabilis has a head unlike any other spinosaur with possibly the tallest head crest of any non-avian dinosaur. Plus, Jeff Bond joins from Ogden's George S. Eccles Dinosaur Park to discuss what it's like running a museum with animatronics, fossils, a prep lab, sculptures, and (in the near future) puppets!For links to every news story, all of the details we shared about Bonatitan, links from Jeff Bond, and our fun fact check out https://iknowdino.com/Bonatitan-Episode-567/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Bonatitan, a small titanosaur sauropod with two well preserved braincases.Interview with Jeff Bond, curator and head paleontologist at Ogden’s George S. Eccles Dinosaur Park in UtahIn dinosaur news this week:There’s a new species of Spinosaurus, Spinosaurus mirabilis, with a very impressive crest on its head We're releasing collectible cards to commemorate the biggest new Dinosaurs of 2025! Reserve your spot…

Dr. Steve Brusatte joins us for a paleontologist interview about The Story of Birds, exploring how birds survived the dinosaur extinction, evolved from dinosaur ancestors, and became one of Earth's most successful groups of animals.In this episode of I Know Dino, we cover new dinosaur discoveries and dinosaur research before sitting down with Steve Brusatte, paleontologist, author, and University of Edinburgh professor. We discuss what the fossil record reveals about bird evolution, why birds are living dinosaurs, and how paleontologists connect modern species to their dinosaur ancestors. Steve explains how scientists study dinosaur evolution, brain evolution, and the survival of bird lineages through the end-Cretaceous extinction.We also talk about giant fossil birds, terror birds, penguins that once rivaled large mammals, and how dinosaur research continues to reshape our understanding of prehistoric life. Along the way, Steve shares stories from his work as a researcher, science communicator, and author,…

An extraordinary fossil find provides fresh evidence about dinosaur behavior and predator-prey interactions.Plus hadrosaurs breaking their tails while mating, a diplodocoid with a broken tail tip, and many more paleopathologies.For links to every news story, all of the details we shared about Koparion, and our fun fact check out https://iknowdino.com/Koparion-Episode-565/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Koparion, a small troodontid we only know from a tooth.In dinosaur news this week:There’s a new herrerasaur, Ptychotherates bucculentusHadrosaurs may have injured their tails while matingA Barosaurus with a long whip-like tail had a fracture at the tip of its tailA tyrannosaur lost the tip of its tooth in the skull of an EdmontosaurusA Plateosaurus with a bone infection in its right arm is the oldest known dinosaur bone infectionCancer has been around for millions of years, including in dinosaursA few titanosaurs were…

The Tanis site is one of the most important paleo sites in North America, showing details of the exact day when the Cretaceous ended. Plus two new cute dinosaurs.For links to every news story, all of the details we shared about Silvisaurus, links from Rob Sula, and our fun fact check out https://iknowdino.com/Silvisaurus-Episode-564/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Silvisaurus, an ankylosaur with a pear-shaped skull.Interview with Rob Sula, the Senior field supervisor for Paleo Prospectors. He's a field paleontologist, teacher, and artist with decades of experience hunting and excavating dinosaurs and has co-discovered some very important fossil sites. He was also recently featured in the documentary Why Dinosaurs?In dinosaur news this week:Dr. Hans Sues has ascended to paleo legend statusThere’s a new cute ornithopod, Foskeia pelendonumThere’s another new, possibly even cuter dinosaur, the thescelosaurid ornithischian…

Lots of new discoveries of soft tissues in dinosaurs. Plus new studies to confirm old soft tissues and a new—controversial—iguanodont.For links to every news story, all of the details we shared about Santanaraptor, and our fun fact check out https://iknowdino.com/Santanaraptor-Episode-563/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Santanaraptor, a small theropod found with soft tissue.In dinosaur news this week:There’s a potentially new iguanodont, Paulodon galvensis (but it is controversial)Soft tissues can be preserved in fossils regardless of the species, age of the bones, or where the animal was buriedA new method using Cross-polarized light microscopy (XPol) helps identify organic molecules in fossilsNew Edmontosaurus "mummies" show hooves, small spikes down the tail, and a banded fleshy crest over the neck and backScientists re-evaluated the soft tissue crest of an edmontosaur hadrosaur dinosaurDinosaurs likely had muscles…

A new troodontid with a skull like a pachycephalosaur, two new prehistoric birds, the bird evolutionary tree, how birds developed the ability to fly, how we know Microraptor turned out to be a decent flier, and a mathematical rule that shapes theropod facesFor links to every news story, all of the details we shared about Archaeopteryx , and our fun fact check out https://iknowdino.com/Archaeopteryx -Episode-562/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Archaeopteryx , the "ancient wing" dinosaur that was originally named for just a single feather, but is now known from over a dozen individuals.In dinosaur news this week:A new troodontid theropod, Xenovenator espinosai, has an extremely thick skull—like a pachycephalosaurScientists have created a complete evolutionary tree of all birds (over 9,000 species)There’s a new neoavian Aequornithes bird from Antarctica, Pujatopouli soberanaThere is a new euornithean bird, Kunpengornis…

Plus a duck-billed dinosaur with a strong jaw and a couple of small dinosaurs from the the U.S. and EuropeJoin us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.In dinosaur news this week:A New Jurassic neornithischian dinosaur with a Voice Box. Pulaosaurus qinglong, from China’s Tiaojishan Formation, has only the second larynx ever found preserved with a non-avian dinosaur. SourceThe small ornithischian Enigmacursor mollyborthwickae was found in the Morrison Formation of Colorado. Reminding us that it wasn't just huge sauropods and stegosaurs eating plants in the Late Jurassic. SourceA new ornithopod named Obelignathus septimanicus was identified from a stronger jawbone than other Late Cretaceous ornithopods (like Rhabdodon) in what is now southern France. It's name refers to the French comic character Obelix who has superhuman strength (like the "unusually robustly-built" jawbone on Obelignathus). SourceAn Early Cretaceous basal hadrosauroid, Cariocecus…

Plus a new alvarezsaurid theropod, Manipulonyx; A huge bonebed in Romania; new dinosaur fossils found at Dinosaur National Monument; and our first Dino Duels winnersFor links to every news story, all of the details we shared about Inosaurus, links from Mark Witton, and our fun fact check out https://iknowdino.com/Inosaurus-Episode-561/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Inosaurus, a dubious theropod known from vertebrae and a piece of its shin.Interview with Mark Witton, a paleontologist, author, and artist, known for his research on pterosaurs and his work with museums, universities, and shows including Walking with Dinosaurs, Planet Dinosaur, Prehistoric Planet, and the IMAX film T. rex. He also has published a number of books, including the recently published King Tyrant. Follow him on bluesky and patreon @markwittonIn dinosaur news this week:There’s a new alvarezsaurid theropod, Manipulonyx reshetoviPaleontologists have…

Riley, one of our favorite dinosaur writers, returns to discuss her latest book and lots of other dinosaur topics. Plus a new ceratopsian—Ferenceratops. And a new Dino Duels Championship.For links to every news story, all of the details we shared about Quaesitosaurus, links from Riley Black, and our fun fact check out https://iknowdino.com/Quaesitosaurus-Episode-560/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Quaesitosaurus, a titanosaur with a skull similar to Diplodocus.Interview with Riley Black, an award-winning science writer whose work has appeared in National Geographic, Scientific American, Nature, Smithsonian, and more. She has written a number of books, including “The Last Days of the Dinosaurs,” “When the Earth was Green,” and most recently “The Shortest History of the Dinosaurs”. Follow her on Bluesky @restingdinofaceIn dinosaur news this week:There’s a new ceratopsian dinosaur, Ferenceratops shqiperorumDinosaurs were…

Five new sauropods from all across the world and the sauropod family tree. Plus new embryos and hatchlings, sauropod speed estimates, and much much more.For links to every news story, all of the details we shared about Cetiosauriscus, and our fun fact check out https://iknowdino.com/Cetiosauriscus-Episode-559/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Cetiosauriscus, a sauropod that isn't Cetiosaurus, but was also from Middle Jurassic of England.In dinosaur news this week:Sauropod experts wrote an introduction to DiplodocoideaThere’s a new titanosaur sauropod, Utetitan zellaguymondeweyaeA new Alamosaurus fossil was foundThere’s a new dicraeosaurid sauropod, Athenar bermaniThere’s a new titanosaur sauropod, Yeneen houssayiThere’s a new eusauropod sauropod, Jinchuanloong nieduThere’s a new species of the sauropod Mamenchisaurus, Mamenchisaurus sanjiangensisSome sauropods chose to lay eggs surrounded by fast moving waters, possibly…

New track sites, swim tracks, and mating dance arenas around the world tell us about the behavior of theropods, ceratopsians, and sauropods. Plus David Spira joins from Room Escape Artist to share his favorite dinosaur themed escape rooms.For links to every news story, all of the details we shared about Segnosaurus, links from David Spira, and our fun fact check out https://iknowdino.com/Segnosaurus-Episode-558/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Segnosaurus, a therizinosaur with interesting teeth.Interview with David Spira, co-creator of RoomEscapeArtist.com, which publishes well-researched, rational, and reasonably humorous escape room reviews, design tips, player tips, and industry commentaryIn dinosaur news this week:The Science Museum of Minnesota closed for a day in response to the local ICE presence. If you want to support Minnesotans go to www.standwithminnesota.com/In Bolivia, there are almost 18,000 theropod…

Robert (Bob) Nicholls has been painting, sculpting, and painting some of our favorite paleoart for decades. He joins us to share how he does it. Plus, a fossil found hundreds of feet below a natural history museum; The world's oldest cerapodan dinosaur; And new theropod and iguanodontian fossilsFor links to every news story, all of the details we shared about Emausaurus, links from Bob Nicholls, and our fun fact check out https://iknowdino.com/Emausaurus-Episode-557/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Emausaurus, a very early armored dinosaur to rival Scutellosaurus and Scelidosaurus.Interview with Bob Nicholls, world-renowned paleoartist, painter, sculptor, and illustrator. His work has been published in more than 40 books (including the Secret Lives of Dinosaurs) and exhibited in nearly 50 museums, universities, and attractions around the world. He’s also appeared on a number of shows and he designed coins for the Royal…

Two new dinosaurs from the middle of the Triassic: the theropod Anteavis and the sauropodomorph Huayracursor. Plus our reviews of several TV shows, movies, and books including Walking with Dinosaurs.For links to every news story, all of the details we shared about Ornithopsis, and our fun fact check out https://iknowdino.com/Ornithopsis-Episode-556/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Ornithopsis, a titanosaur found way back in the 1830s which was named for its bone's similarity to the lightweight structure of a bird's skeleton.In dinosaur news this week:We not yet have found the earliest dinosaur fossils, but they may be in the Amazon and areas by the equator in South America and AfricaDinosaurs may have originated in South America, and then moved simultaneously to the east and northThere’s a new very early theropod dinosaur, Anteavis crurilongusA nearly complete skeleton from a Triassic sauropodomorph, Huayracursor…

Spicomellus, Nanotyrannus, and tons of other fantastic new discoveries!For links to every news story, all of the details we shared about Garudimimus, and our fun fact check out https://iknowdino.com/Garudimimus-Episode-555/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Garudimimus, an ornithomimosaur that wasn't that fast.In dinosaur news this week:Smallest find to make a big impact: Ahvaytum (ep 531)HM: Archaeocursor (ep 533)HM: Itaguyra (ep 545)HM: Maleriraptor (ep 550)HM: Taleta (ep 553)Most surprising new dinosaur: Nanotyrannus lethaeus (ep 554)Best new therizinosaur: Duonychus (ep 535)Best new pachycephalosaur: Zavacephale (ep 553)HM: Brontotholus (ep 553)Best new ornithomimid: Mexidracon (ep 551)Best new basal neornithischian: Pulaosaurus (DD 7)Best new ankylosaurid genus: Huaxiazhoulong (ep 530)Best new dromaeosaur: Shri rapax (DD8)Best new compsognathid*: Huadanosaurus (ep 541)Best new iguanodontian: Istiorachis (ep 548)Best…

Two separate groups of researchers have independently confirmed that Nanotyrannus is its own genus and not just a juvenile T. rex. Plus a new Nanotyrannus species and another new tyrannosauroid and tyrannosaur injuries.For links to every news story, all of the details we shared about Calamosaurus, and our fun fact check out https://iknowdino.com/Calamosaurus-Episode-554/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Calamosaurus, a small theropod that’s been mixed up with lots of other theropods.In dinosaur news this week:A new complete Nanotyrannus skeleton confirms that it deserves its own genus and is not just a juvenile Tyrannosaurus rexA close analysis of the small throat (hyoid) bone from the Nanotyrannus holotype confirms it was nearly full-sizedReview of the taxonomic history of NanotyrannusThere’s a new Late Cretaceous tyrannosauroid, Khankhuuluu mongoliensis, related to the fluffy YutyrannusScotty the T. rex appears to have…

Zofia Kielan-Jaworowska was a Polish scientist and the first woman to lead a dinosaur excavation expedition. On her explorations of the Gobi Desert, she discovered many famous animals, including Deinocheirus—a dinosaur that, for decades, was known only by its enormous, terrifying arms & claws. But when we finally found the rest of its body, it turned out to look more like Jar Jar Binks. This is the story of Zofia, and the dinosaur that surprised us all - as told originally aired on the History Dispatches podcast with Matt and McKinley Breen.History Dispatches Podcast: https://historydispatches.com/The Explorers Podcast: https://explorerspodcast.com/History Dispatches & Explorers Podcast are part of the Airwave Media Network: www.airwavemedia.comI Know Dino Website: https://iknowdino.comI Know Dino Book:…

Zavacephale is both the oldest and most complete pachycephalosaur ever found. Plus three more new dinosaurs and Michele Hollow joins us to discuss Mary Anning.For links to every news story, all of the details we shared about Stenopelix, links from Michele Hollow, and our fun fact check out https://iknowdino.com/Stenopelix-Episode-553/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Stenopelix, a small (likely) ceratopsian that we only know from impressions in sandstone slabs.Interview with Michele Hollow, an award-winning journalist, and author of the book “Jurassic Girl: The Adventures of Mary Anning, Paleontologist and the First Female Fossil Hunter”, a historical fiction book for both young and less young readers.In dinosaur news this week:The most complete and oldest known pachycephalosaur was discovered and named Zavacephale rinpocheThere’s a new "thunder dome" pachycephalosaur, Brontotholus harmoniThere’s a new flat-headed…

Plus, a new species of megaraptor, Joaquinraptor casali, is one of the most complete ever found.For links to every news story, all of the details we shared about Dromaeosauroides, and our fun fact check out https://iknowdino.com/Dromaeosauroides-Episode-552/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Dromaeosauroides, a theropod we only know from two teeth, and maybe some fossilized poop.In dinosaur news this week:A new megaraptor, Joaquinraptor casali, may have died in the middle of eating a crocodilianAnalyzing skull mechanics can tell us a lot about different theropod dinosaur feeding strategiesThe alvarezsaur Bannykus ate meat (instead of maybe insects)A poor sauropod got gnawed on by a theropod (probably)The gut contents of a subadult Diamantinasaurus shows it was not a picky eater and it did not chew its foodA closer look at coprolites found in the Lameta Formation in India show they were likely pooped out by an omnivorous…

We joined the Common Descent podcast for their Silver Screen Science segment.We go through everything Jurassic World Rebirth got right and wrong as well as our nit-picks of the details that got under our skin.Check out the More Thoughts segment at https://www.patreon.com/posts/142875146/ for more.Check out the Common Descent Podcast at commondescentpodcast.com and join their patreon at www.patreon.com/c/commondescentpodcast See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Amy Atwater, co-host of Weird & Dead joins to discuss some of her favorite fossils and her new book The Fossil Keeper's Treasure. Plus a new ornithomimosaur with big hands, Mexidracon, and monstersaursFor links to every news story, all of the details we shared about Mochlodon, links from Amy Atwater, and our fun fact check out https://iknowdino.com/Mochlodon-Episode-551/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Mochlodon, a stocky island dinosaur that was first found way back in 1859.Interview with Amy Atwater, a paleontologist and science communicator, the Director of Paleontology at Friends of Dinosaur Ridge in Morrison, Colorado, co-host of the podcast Weird & Dead, and author of the book “The Fossil Keeper’s Treasure”. Follow her @Mary_Annings_RevengeIn dinosaur news this week:There’s a new ornithomimosaur with very large hands named Mexidracon longimanus This episode is brought to you by our patrons. Their generous…

Herrerasaurs are some of the earliest known dinosaurs and these Triassic carnivores have been found all over the world. They're a confusing group, but thanks to pathologies and fossilized poop we know a bit about how they behaved.For links to every news story, all of the details we shared about Sanjuansaurus, and our fun fact check out https://iknowdino.com/Sanjuansaurus-Episode-550/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Sanjuansaurus, a herrerasaur dinosaur whose existence helps show dinosaurs’ dominance.In dinosaur news this week:There’s a new herrerasaur dinosaur, Maleriraptor kuttyiHerrerasaurs probably bit each other on the faceHerrerasaurs were a successful, complicated group This episode is brought to you by our patrons. Their generous contributions make our podcast possible! You can now save 10% by paying annually. Go to Patreon.com/iknowdino to sign up and help us keep creating I Know Dino every week. See Privacy…

A new Spicomellus find reveals just how crazy its armor was. Plus Six brand new sauropods!For links to every news story, all of the details we shared about Liaoningosaurus, and our fun fact check out https://iknowdino.com/Liaoningosaurus-Episode-549/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Liaoningosaurus, a small ankylosaur that may or may not have been semi-aquatic and carnivorous.In dinosaur news this week:A much more complete Spicomellus skeleton was found with some of the strangest and most elaborate armor ever seenThere’s a new sauropodomorph species, Xingxiulong yueorum, which is quite a bit bigger than the previous species from the genusThe oldest known sauropodomorph from East Asia, Wudingloong wui, was just describedThere’s a new eusauropod, Huashanosaurus qini, named for famous mountain with impressive rock artThere’s a new mamenchisaurid sauropod, Tongnanlong zhimingi, which is estimated to be over 80ft longThere’s a…

Dr. Dean Lomax and Bob Nicholls join to tell us about their upcoming book The Secret Lives of Dinosaurs (which includes some really cool fossils like an extremely rare two-headed fossil)For links to every news story, all of the details we shared about Calamospondylus, links from Dean Lomax and Bob Nicholls, and our fun fact check out https://iknowdino.com/Calamospondylus-Episode-548/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Calamospondylus, an Early Cretaceous oviraptorosaur that was probably under 2.5m (~8ft) long.Interview with Dean Lomax and Bob Nicholls. Dean Lomax is an award-winning paleontologist, author, and presenter, as well as Honorary Research Fellow at The University of Manchester & 1851 fellow at the University of Bristol. He’s the leading authority on ichthyosaurs, and he also excavates and researches dinosaurs. Bob Nicholls is a world-renowned natural history artist who specializes in prehistoric animals, plants,…

The discovery of a new Psittacosaurus species from a braincase, how spinosaur brains adapted for eating fish, revisiting T. rex intelligence, and many more dinosaur brain updatesFor links to every news story, all of the details we shared about Tatankacephalus, and our fun fact check out https://iknowdino.com/Tatankacephalus-Episode-547/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Tatankacephalus, the "bison-headed" armored dinosaur.In dinosaur news this week:A skull, including a braincase, is enough to tell us there’s a new Psittacosaurus species, Psittacosaurus houiStudying dinosaur brains is an evolving fieldBrain size varied in dinosaursCeratopsians became less intelligent and had worse hearing and a worse sense of smell as they evolved to larger sizesOrnithopods, and especially hadrosaurs, had bigger brains than we thoughtThescelosaurus had a powerful sense of smell, a sensitive vestibular system, but terrible hearing—all which…

New support for Troodon as a valid dinosaur genus. Plus Dr. Kenneth Lacovara joins us to discuss the Edelman Fossil Park & Museum, Colossal Biosciences, Dreadnoughtus, Jurassic Park, and more.For links to every news story, all of the details we shared about Veterupristisaurus, links from Kenneth Lacovara, and our fun fact check out https://iknowdino.com/Veterupristisaurus-Episode-546/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Veterupristisaurus, a carcharodontosaurid theropod that lived in the Jurassic in what is now Tanzania.Interview with Dr. Kenneth Lacovara, a paleontologist, professor, explorer, science communicator (a TED speaker and author), Explorer’s Club medalist, and he is the founding dean of the School of Earth & Environment at Rowan University, executive director of the Edelman Fossil Park & Museum, and he serves on the Board of Scientific Advisors for Colossal BiosciencesIn dinosaur news this week:Is Troodon a legit…

Silesaurs are definitely dinosauromorphs (close relatives of dinosaurs) but were they true dinosaurs?For links to every news story, all of the details we shared about Planicoxa, and our fun fact check out https://iknowdino.com/Planicoxa-Episode-545/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Planicoxa, an iguanodont known from its flat hips with a species name that means "poison".In dinosaur news this week:There’s a new silesaurid, Itaguyra occulta, whose name means "Stone Bird" in Tupi—a language from Southern Brazil where it was foundA new large femur found in Zambia may have been from a 10ft (3m) long silesaur—quite large for theProbable silesaur arm and leg bones from the Late Triassic were described from what is now Texas Our Styracosaurus patch is back for a limited time! Join our patreon at the Silesaurus tier or above by the end of August 2025 to get the exclusive patch. You’ll also get a 30 days of dinosaurs PDF booklet,…

Two new species, Zhongyuansaurus junchangi and Tianzhenosaurus chengi. How paleontologists use details in the ankylosaur armor to identify the species. Plus, the first ever ankylosaurid (tail club-wielding ankylosaur) footprint.For links to every news story, all of the details we shared about Mojoceratops, and our fun fact check out https://iknowdino.com/Mojoceratops-Episode-544/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Mojoceratops, a ceratopsian that got its mojo from its frill.In dinosaur news this week:A new ankylosaur, Zhongyuansaurus junchangi, with "swallowtail" shaped tail armorA good overview of how osteoderm patterns vary between different ankylosaur speciesThe best way to distinguish ankylosaur species is probably by comparing skullsA new ankylosaur skull led to another new ankylosaur species being named: Tianzhenosaurus chengiNew ankylosaur fossils were excavated in Argentina, a rare find for South AmericaOsteoderms…

We saw Jurassic World Rebirth on opening day, but haven't discussed it with each other yet. We share all our favorite moments, dinosaurs, and theories about the movie.For all of our fun facts and other details go to https://iknowdino.com/-Episode-543/In this episode, we break down the horror-infused tone of Jurassic World: Rebirth, from malfunctioning park systems to scary Mosasaurus sequences. We explore standout scenes like Bronto Billy’s first appearance in NYC, the Quetzalcoatlus and Spinosaurus teaming up with the Mosasaur. We give our thoughts on the all new cast including Scarlett Johansson (Zora Bennett), Mahershala Ali (Duncan Kincaid), Jonathan Bailey (Dr. Henry Loomis), and other minor characters.We also dive into updated animal portrayals—like the adorable backpack-sized Aquilops named Dolores, the eerie hybrid Mutadon, and the menacing Distortus rex—along with practical effects and callbacks to earlier films. Finally, we debate what worked, what didn’t, favorite dinos, and lingering questions…

New species, old species, size, behavior, and everything we else we know about Allosaurus!For links to every news story, sources about Allosaurus, and our fun fact check out https://iknowdino.com/Allosaurus revisited-Episode-542/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Allosaurus, the quintessential (Late) Jurassic theropod.In dinosaur news this week:Free dinosaur event with the Colorado Northwestern Community College Paleo Crew on June 28Some of the topics from our Allosaurus discussion:There are multiple species, including A. fragilis and A. jimmadseniDebate over the species A. europaeusWhether A. europaeus could be A. fragilisThere's also a new species (and no more Saurophaganax): A. anaxPlus, we get into its Bone Wars history, the Cleveland-Lloyd Dinosaur Quarry, other former species, its hunting and scavenging habits, all the pathologies, what its habitat was like, future research, and more Dire wolves are the subject of…

Dr. Michael O'Sullivan joins to discuss his part in bringing dinosaurs to Dungeons & Dragons (and Pathfinder). We also cover the latest and greatest AI methods used in paleontology. Plus two new "compsognathid-like" dinosaurs and an ankylosaur for our dinosaur of the day.For links to every news story, all of the details we shared about Panoplosaurus, links from Michael O’Sullivan, and our fun fact check out https://iknowdino.com/Panoplosaurus-Episode-541/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Panoplosaurus, an ankylosaur with nasal passages that resemble a French horn.Interview with Michael O’Sullivan, an Irish based paleontologist and writer and researcher for Palaeogames, which specializes in introducing realistic dinosaurs and other extinct animals into Tabletop Role-Playing Games.In dinosaur news this week:There are two new compsognathid-like dinosaurs: Sinosauropteryx lingyuanensis and Huadanosaurus sinensisPatron…

Uriash kadici and Petrustitan hungaricus lived on Hateg island and would have had to deal with the murder giraffe—Hatzegopteryx. Plus the "titan of salt" Chadititan. We also celebrate world metrology day with some dinosaur size comparisons.For links to every news story, all of the details we shared about Eodromaeus, and our fun fact check out https://iknowdino.com/Eodromaeus-Episode-540/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Eodromaeus, the aptly named "dawn runner".In dinosaur news this week:There are two new titanosaur dinosaurs from Hateg Island: Uriash kadici (the largest known from the island) and Petrustitan hungaricus (formerly lumped with Magyarosaurus)There’s another new titanosaur dinosaur, Chadititan calvoi, from Patagonia that was very small for a titanosaur This episode is brought to you by Sauros: the dino trick-taking puzzle game! Featuring beautiful mahjong-like tiles, paleoart-covered playmats, and custom dice…

We have loved Franco's art longer than we knew the term "paleoart". He joins to explain his process of illustrating for books–including ours. Plus a new sauropodomorph with a big head named Lishulong wangi.For links to every news story, all of the details we shared about Chilantaisaurus, and our fun fact check out https://iknowdino.com/Chilantaisaurus-Episode-539/Dinosaur of the day Chilantaisaurus, an very large theropod with impressive claws.In dinosaur news this week:There’s a new sauropodomorph dinosaur, Lishulong wangi, and it had a large skullOver two decades, Franco has illustrated more than 50 books on dinosaurs and prehistoric mammals for major publishers worldwide. His piece “T. rex couple vs. Dakotaraptor pack” won the 2016 John J. Lanzendorf-National Geographic PaleoArt Prize. He compares the scene to lions defending a kill from hyenas, highlighting the possible social dynamics between top predators and opportunistic rivals. Check out his illustrations and the text of the interview here:…

We bring back our fan-favorite segment: Dinosaurs on Trial! Patrons submitted dinosaur “crimes,” and we argue the cases like whether or not compsognathids are misidentified juvenile theropods. Plus a new ornithomimid from Uzbekistan named Dzharacursor.For links to every news story, all of the details we shared about Nurosaurus, and our fun fact check out https://iknowdino.com/Nurosaurus-Episode-538/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Nurosaurus, an informally named sauropod with a stress fracture in its toe.In dinosaur news this week:There’s a new ornithomimid dinosaur, Dzharacursor bissektensis, that may contain medullary bone For our Dinosaurs on Trial segment, patrons submitted dinosaur “crimes,” and we argue the cases:Did Ankylosaurus cruelly attack a mother T. rex in Walking With Dinosaurs?Are compsognathids just mislabeled juvenile theropods?Did T. rex throw the fight against Spinosaurus in Jurassic Park 3?Did T. rex…

Interview with Tone Blakesley, who recently described 131 dinosaur footprints on the Isle of Skye, Scotland. The tracks include those made by Megalosaurus and Cetiosaurus (or close relatives) and Tone made an accompanying documentary for the paper.For links to every news story, all of the details we shared about Ornithodesmus, links from Tone Blakesley, and our fun fact check out https://iknowdino.com/Ornithodesmus-Episode-537/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Ornithodesmus, a dinosaur that was first thought to be a bird based on its hip bones (sacrum) and later considered to be a pterosaur.Interview with Tone Blakesley, a Master's graduate University of Edinburgh and lead author of a new paper about 131 dinosaur footprints on the Isle of Skye in ScotlandIn dinosaur news this week:Tone Blakesley's new paper describing a Middle Jurassic lagoon preserved in modern day ScotlandThe documentary of the tracks that Tone made to…

Yuanmouraptor wasn't a raptor or a megaraptorid, but it did have two foot long jaws full of sharp, serrated, teeth. Plus a "noble" tyrannosauroid, Kileskus, that had a long crest down its head and lived about 100 million years before T. rex.For links to every news story, all of the details we shared about Kileskus, and our fun fact check out https://iknowdino.com/Kileskus-Episode-536/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Kileskus, one of the oldest known tyrannosauroids. It lived in the Middle Jurassic of what is now Siberia.In dinosaur news this week:There’s a new carnivorous metriacanthosaurid dinosaur, Yuanmouraptor jinshajiangensis This episode is brought to you by the Colorado Northwestern Community College. Join them for two weeks digging up dinosaur bones from the Jurassic Period in Northwest Colorado this summer. For details go to CNCC.edu/dinodig See Privacy Policy at https://art19.com/privacy and California Privacy…

Duonychus tsogtbaatari was found in what is now Mongolia with strong evidence that it only had two fingers on each hand. Plus the Jurassic World: Rebirth trailer, Walking with Dinosaurs is coming back, and more.For links to every news story, all of the details we shared about Sinovenator, and our fun fact check out https://iknowdino.com/Sinovenator-Episode-535/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Sinovenator, a common troodontid, one of which was found curled up in a sleeping posture similar to Mei long.In dinosaur news this week:There’s a new therizinosaur with just two large claws per hand, Duonychus tsogtbaatariThere’s a trailer for Jurassic World: RebirthBBC’s Walking with Dinosaurs revival is coming out later this yearThere’s a new dinosaur horror comedy, called The Invisible RaptorPetition to save "Tyra" the "world's largest dinosaur" in DrumhellerPetition to make T. rex the U.S. national fossil This episode is brought…

Tameryraptor markgrafi is a significant dinosaur that was named by an even more significant paleontologist. But only photos and a braincase of it remain.For links to every news story, all of the details we shared about Dakotadon, and our fun fact check out https://iknowdino.com/Dakotadon-Episode-534/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Dakotadon, an ornithopod that was originally pronounced the "first species from the United States that can be clearly referred to the European genus Iguanodon".In dinosaur news this week:The newly named Tameryraptor is such a significant find that it could be considered the original Carcharodontosaurus This episode is brought to you by the Colorado Northwestern Community College. Join them for two weeks digging up dinosaur bones from the Jurassic Period in Northwest Colorado this summer. For details go to CNCC.edu/dinodig See Privacy Policy at https://art19.com/privacy and California Privacy…

Archaeocursor may have been named after an April Fool's Joke, but it was a real dinosaur.For links to every news story, all of the details we shared about Earl Sinclair, and our fun fact check out https://iknowdino.com/Earl Sinclair-Episode-533/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaurs of the day: Earl Sinclair, Godzilla, & Cryptids.In dinosaur news this week:There is a Shady dinosaur, and it's a TriceratopsA Stegosaurus just sold for over 13 million dollars using shares as a sort of "investment"An Apatosaurus sold in Europe for about 6 million EurosArchaeocursor asiaticus is the oldest known ornithischian from AsiaA 47 gram (1.7 ounce) enantiornithine bird was described with "robust teeth" and feather tracesThe "short pubis" enantiornithean bird, Novavis pubisculata, was named from the Early Cretaceous of ChinaNavaornis hestiae was named after the Greek goddess Hestia, the oldest and youngest Olympian (Navaornis is an old bird with a…

A pair of Yuanyanglong were found together in the summer of 2021 after fossilizing together for 100 million years. Plus our Dino Duels continueFor links to every news story, all of the details we shared about Phuwiangosaurus, and our fun fact check out https://iknowdino.com/Phuwiangosaurus-Episode-532/Join us at www.patreon.com/iknowdino for dinosaur requests, bonus content, ad-free episodes, and more.Dinosaur of the day Phuwiangosaurus, the first sauropod named from Thailand.In dinosaur news this week:There’s a new oviraptorosaurian dinosaur, Yuanyanglong bainian, the "lovebird dragon" This episode is brought to you by the Colorado Northwestern Community College. Join them for two weeks digging up dinosaur bones from the Jurassic Period in Northwest Colorado this summer. For details go to CNCC.edu/dinodig See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.