I Know Dino: The Big Dinosaur Podcast· Folge 571

Dinosaur Growth!

Freitag, 7. August 2026 · 1 h 09

MP3

Shownotes

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 research
For links to every news story, all of the details we shared about Tambatitanis, and our fun fact check out iknowdino.com/Tambatitanis-Episode-571
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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 tocantinensis
• When estimating how dinosaurs grew, some models may be missing important data points
• Dinosaurs were likely thicker and heavier than previously estimated
• How much did climate affect dinosaur body size evolution? It’s hard to say
• Scans of Early Triassic archosauromorph fossils show that this group had a variety of growth strategies from the beginning
• How scales grow as dinosaurs grow can give us some information on how they lived
• Tyrannosaur hatchlings may have left the nest shortly after hatching to hunt
• It took Tyrannosaurus rex 40 years to reach its full size
• Ceratosaurus grew more than 9 times faster than some of its fellow ceratosaurs
• The basal ornithopod Changchunsaurus was one of the slowest growing dinosaurs (that we know of)
• Maiasaura grew in a way that it needed a lot of parental care as a hatchling
• The hadrosaur Gryposaurus grew (mostly) isometrically (meaning everything grew at the same rate)
• The small iguanodont Dysalotosaurus had some interesting fused bones in its neck
• A new, tiny, young sauropodomorph sheds light on how early dinosaurs grew
• The titanosaur Neuquensaurus grew quickly, but differently than expected

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