All articles tagged with #t rex
Scientists studying a Hell Creek Formation Edmontosaurus skull found a tooth lodged in its snout, a rare embedded-tooth fossil that lets researchers identify the attacker as Tyrannosaurus rex. CT scans show a frontal bite, the tooth’s serrations match T. rex, and bite marks suggest the predator continued feeding on the head after the kill, implying a direct encounter rather than distant scavenging.
A biomechanical analysis finds T. rex likely moved toe-first, similar to birds, enabling up to 20% faster speeds; a light 1.4-tonne T. rex could cover 100m in about 8.77 seconds, faster than Usain Bolt’s world record, with larger individuals still near 10.5 seconds.
Fossil data from the Dry Mesa Quarry reconstruct a dense Jurassic food web in which abundant hatchling sauropods provided a reliable prey source for large predators, shaping predator dynamics across the Late Jurassic and helping explain how later giants like Tyrannosaurus rex could accumulate calories to grow to enormous sizes.
Recent fossil discoveries suggest that T. rex was not only a land predator but also capable of swimming, supported by evidence of fossilized swim traces and its hollow, buoyant bones, indicating it may have used swimming to expand its feeding opportunities, similar to modern birds like emus.
Recent research has revealed that the small predator previously thought to be a juvenile T. rex is actually a fully grown Nanotyrannus lancensis, rewriting the understanding of dinosaur growth, evolution, and ecosystem dynamics during the Late Cretaceous period, and introducing a new species, Nanotyrannus lethaeus.
A fossil named Jane, previously thought to be a juvenile T. rex, may actually belong to a new species called Nanotyrannus lethaeus, which is smaller and more agile, prompting a reevaluation of tyrannosaur classification.
Scientists have discovered that the 'dueling dinosaurs' fossil actually features a fully grown Nanotyrannus lancensis, not a juvenile T. rex, challenging long-held beliefs about T. rex growth and diversity, and revealing that multiple tyrannosaur species coexisted in the late Cretaceous period.
A fossil previously thought to be a juvenile Tyrannosaurus rex has been identified as a different species, Nanotyrannus, which was a fully grown, agile predator with distinct physical features, prompting a re-evaluation of tyrannosaur evolution.
Fossils initially thought to be juvenile T. rex in Montana are actually a new species, Nanotyrannus lancensis, a small-bodied predator from the late Cretaceous period, providing new insights into dinosaur diversity and evolution.
Scientists have discovered that a famous fossil previously thought to be a juvenile T. rex is actually a different species, Nanotyrannus lancensis, and have identified a new tyrannosaur species, challenging long-held beliefs about tyrannosaur diversity and ecosystem complexity in the late Cretaceous period.
A new, well-preserved tyrannosaur fossil from Montana provides strong evidence that Nanotyrannus is a distinct species, challenging decades of scientific consensus that these small tyrannosaurs were just juvenile T. rex, leading to a major reassessment of tyrannosaur classification and evolution.
Scientists used advanced synchrotron X-ray imaging to discover preserved blood vessels in a T. rex fossil, Scotty, revealing new insights into dinosaur biology, injury healing, and fossilization processes, which could enhance future paleontological research.
Paleontologists in Zhucheng, China, have discovered a massive tyrannosaur fossil, potentially larger than the famous T. rex 'Sue,' which may be a new species called Zhuchengtyrannus magnus. This find could reshape our understanding of tyrannosaur origins, suggesting they may have originated in Asia before migrating to North America. The discovery highlights Zhucheng's significance as a key site for dinosaur research.
Scientists used advanced imaging techniques to identify preserved mineral casts of blood vessels in a 67-million-year-old T. rex rib, revealing insights into dinosaur healing processes and soft tissue preservation in fossils.
A study analyzing the skulls and bite forces of 17 theropod dinosaurs reveals that Tyrannosaurus had the strongest bite, but other large predators like Giganotosaurus and Spinosaurus used different feeding strategies, showcasing diverse evolutionary adaptations in predatory dinosaurs.