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A study on the diversification of non-avian dinosaurs, inferred from available dinosaur phylogenies, is published by Allen et al. (2024), who find it impossible to decisively conclude whether dinosaurs experienced a decline in diversity before the Cretaceous–Paleogene extinction event on the basis of available data, noting the impact of the ...
A revision of the known material assigned to the genus Haplocanthosaurus is published by Boisvert et al. (2025). [43] Fossil material of lithostrotian titanosaurs assigned to two morphotypes, including caudal vertebrae preserved with rare pathological features, is described from the Upper Cretaceous Cambambe Basin by Lacerda et al. (2025). [44]
A variation of this analogy instead compresses Earth's 4.6 billion year-old history into a single day: While the Earth still forms at midnight, and the present day is also represented by midnight, the first life on Earth would appear at 4:00 am, dinosaurs would appear at 10:00 pm, the first flowers 10:30 pm, the first primates 11:30 pm, and ...
Researchers are now proposing a surprising location for the birthplace of dinosaurs, based on the locations of the currently oldest-known dinosaur fossils, the evolutionary relationships among ...
The discovery, made public Wednesday, includes well-preserved footprints of reptiles and amphibians that scientists say date back 280 million years to a geologic period known as the Permian period.
Coelophysis (/ s ɛ ˈ l ɒ f ɪ s ɪ s / se-lOF-iss-iss traditionally; / ˌ s ɛ l oʊ ˈ f aɪ s ɪ s / SEL-oh-FY-siss or / ˌ s iː l oʊ ˈ f aɪ s ɪ s / SEE-loh-FY-siss, as heard more commonly in recent decades [3]) is a genus of coelophysid theropod dinosaur that lived approximately 215 to 208.5 million years ago during the Late Triassic period from the middle to late Norian age in what ...
A nearly 100 million-year-old firefly fossilized in amber sheds light on how the bioluminescent insects evolved during the time of dinosaurs, a new study finds.
While the dinosaurs' modern-day surviving avian lineage (birds) are generally small due to the constraints of flight, many prehistoric dinosaurs (non-avian and avian) were large-bodied—the largest sauropod dinosaurs are estimated to have reached lengths of 39.7 meters (130 feet) and heights of 18 m (59 ft) and were the largest land animals of ...