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Maidment (2024) describes the diversity of dinosaurs from the upper Morrison Formation (United States) in time and space, and finds evidence supporting cladogenesis as a means of increasing diplodocine diversity over time, as well as spatial segregation of Allosaurus and Camarasaurus species. [131]
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 ...
Dinosaurs evolved partway through the Triassic period of the Mesozoic era, around 230 Ma (million years ago). At that time, the earth had one supercontinental landmass, called Pangaea , of which Europe was a part.
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.
The smallest known non-avialan dinosaurs were about the size of pigeons and were those theropods most closely related to birds. [160] For example, Anchiornis huxleyi is currently the smallest non-avialan dinosaur described from an adult specimen, with an estimated weight of 110 g (3.9 oz) [ 161 ] and a total skeletal length of 34 centimeters (1 ...
The asteroid that killed most dinosaurs 66 million years ago left behind traces of its own origin. Researchers think they know where the Chicxulub impactor came from based on levels of ruthenium.
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 six-mile-long asteroid, which struck Earth 66 million years ago, wiped out the dinosaurs and more than half of all life on Earth.The impact left a 124-mile-wide crater underneath the Gulf of ...