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Dinosaurs

This category contains 29 posts

Example 2

Dinosaurs are a varied group of animals from taxonomicmorphological and ecological standpoints. Birds, at over 10,000 living species,[8] are the most diverse group of vertebrates besides perciform fish.[9] Using fossil evidence, paleontologists have identified over 500 distinct genera[10] and more than 1,000 different species of non-avian dinosaurs.[11] Dinosaurs are represented on every continent by both extant species (birds) and fossil remains.[12] Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to have been sluggish and cold-blooded. Most research conducted since the 1970s, however, has indicated that all dinosaurs were active animals with elevated metabolisms and numerous adaptations for social interaction. Some were herbivorous, others carnivorous. Evidence suggests that egg-laying and nest-building are additional traits shared by all dinosaurs, avian and non-avian alike. (more…)

Example 1

Dinosaurs are a varied group of animals from taxonomicmorphological and ecological standpoints. Birds, at over 10,000 living species,[8] are the most diverse group of vertebrates besides perciform fish.[9] Using fossil evidence, paleontologists have identified over 500 distinct genera[10] and more than 1,000 different species of non-avian dinosaurs.[11] Dinosaurs are represented on every continent by both extant species (birds) and fossil remains.[12] Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to have been sluggish and cold-blooded. Most research conducted since the 1970s, however, has indicated that all dinosaurs were active animals with elevated metabolisms and numerous adaptations for social interaction. Some were herbivorous, others carnivorous. Evidence suggests that egg-laying and nest-building are additional traits shared by all dinosaurs, avian and non-avian alike.

New Dino fm Argentina

New Dino fm Argentina

Since the first dinosaur fossils were recognized in the early 19th century, mounted fossil dinosaur skeletons have been major attractions at museums around the world, and dinosaurs have become an enduring part of world culture. The large sizes of some dinosaur groups, as well as their seemingly monstrous and fantastic nature, have ensured dinosaurs’ regular appearance in best-selling books and films, such as Jurassic Park. Persistent public enthusiasm for the animals has resulted in significant funding for dinosaur science, and new discoveries are regularly covered by the media.

Birds are now recognized as being the sole surviving lineage of theropod dinosaurs. In traditional taxonomy, birds were considered a separate class that had evolved from dinosaurs, a distinct superorder. However, a majority of contemporary paleontologists concerned with dinosaurs reject the traditional style of classification in favor of phylogenetic taxonomy; this approach requires that, for a group to be natural, all descendants of members of the group must be included in the group as well. Birds are thus considered to be dinosaurs and dinosaurs are, therefore, not extinct.[21] Birds are classified as belonging to the subgroup Maniraptora, which are coelurosaurs, which are theropods, which are saurischians, which are dinosaurs.

13 Sep 18: Practice 2

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8 June 2017 – New Baby Oviraptor Dinosaur Fossils Found

8 June 2017 – The fossil of a baby Oviraptor dinosaur discovered in China more than 25 years ago has formally been identified as a new species of feathered dinosaur. The hatchling oviraptor fossil, dubbed Baby Louie, was found within a nest of dinosaur eggs. Palaeontologists have called it Beibeilong sinensis, which translates to “Chinese baby dragon”. They say it is the first known specimen of a gigantic bird-like dinosaur belonging to the group known as oviraptorosaurs.

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11 April 2017: Reconstructing Feathered Dinosaurs From Fossils. Using New Laser Imaging Technology

Fossilized dinosaur remains usually only preserve bone shapes. However, paleontologists at the University of Hong Kong have reconstructed a detailed feathered dinosaur’s body outline through high definition soft tissue imaging. Laser-stimulated flourescence (LSF), a revolutionary new technology, uses high power lasers to make unseen soft tissue preserved along with the bones glow. The laser makes the few remaining skin atoms stand out within the rock matrix, which helps show the actual shape of the dinosaur.

Over 200 specimens of the feathered bird-like dinosaur Anchiornis were were examined, but only 12 showed evidence preservation of soft tissue outlines. Their reconstruction showed contours on the wings and legs, including some well-preserved outlines of foot scales – all of which increases scientific understanding of the origin of birds. Since Anchiornis lived in the late Jurassic period about 160 million years ago, around the time birds first appeared, the new reconstructions help paleontologists understand how dinosaurs evolved to eventually achieve flight. The University of Hong Kong team is currently planning trips worldwide to scan other fossil specimens.

The researchers work was published in Nature Communications this month.

 Fossilized Anchiornis Wing