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The results of pioneering efforts to age dinosaur fossils using growth ring counts suggest that the longevity of the basal ceratopsian Psittacosaurus mongoliensis was 10 or 11 years. [5] The prosauropod Massospondylus carinatus 15 years of age, [ 6 ] the sauropods Lapparentosaurus and Narindasaurus 43 years, [ 7 ] the coelophysoid Megapnosaurus ...
They are represented today by a single species, the tuatara (Sphenodon punctatus) ... non-avian dinosaurs died out, [34] while some crocodiles survived.
He argued that feeding its great bulk would have led it to consume the entire last generation of dinosaurs before they could even hatch, leading to their extinction. [20] He also suggested that mammals may have driven the dinosaurs extinct by eating all of their eggs. [7] 1928. L. Müller proposed that volcanic eruptions drove the dinosaurs ...
The fossil skeleton of a newly discovered dinosaur species was found in a position suggesting it slept like modern birds. Dinosaur from newfound species died in a pose that sheds light on ...
We knew that an asteroid heralded the end of the age of the dinosaurs. Now researchers say they have discovered a key element in their extinction ... 'My son died at 24 - now I'm doing his bucket ...
Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research.
Juvenile T. Rex finds: a fierce debate. Based on early estimates, Lyson thinks the fossil is that of a young T. rex that died of an unknown cause when it was 13 or 15 years old.
Luis Walter Alvarez, left, and his son Walter, right, at the K–T Boundary in Gubbio, Italy, 1981. The Alvarez hypothesis posits that the mass extinction of the non-avian dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth.