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Dino Arms Led To Wings

Flight_stages, Lucas, Frederic A.Many dinosaurs, like T. rex, had scrawny arms, but paleontologists have discovered that as dinosaurs gradually evolved bigger arms, they began to stand and move more like birds.
The change, documented in the journal Nature, passed on to the descendants of dinosaurs – birds themselves.
“Our study shows how mass was allocated to the forelimbs, starting in non-flying dinosaurs, to turn them into longer, heavier, more muscular wings that became more and more effective for flapping during flight,” co-author John Hutchinson of the Royal Veterinary College’s Structure and Motion Lab.
Hutchinson and his colleagues used digitizing technology to create 3D images of the skeletons of 17 archosaurs, a group that included living crocodiles and birds as well as extinct dinosaurs. The researchers then digitally added flesh around the skeletons to estimate the overall shape of the body as well as the individual body parts, such as the head, forelimbs and tail.
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Origin Of Flight More Complex

Eosinopteryx-1024x728The discovery of a new bird-like dinosaur from the Jurassic period challenges widely accepted theories on the origin of flight.
Co-authored by Dr Gareth Dyke, Senior Lecturer in Vertebrate Palaeontology at the University of Southampton, the paper describes a new feathered dinosaur about 30 cm in length which pre-dates bird-like dinosaurs that birds were long thought to have evolved from.
Over many years, it has become accepted among palaeontologists that birds evolved from a group of dinosaurs called theropods from the Early Cretaceous period of Earth’s history, around 120-130 million years ago. Recent discoveries of feathered dinosaurs from the older Middle-Late Jurassic period have reinforced this theory.
The new ‘bird-dinosaur’ Eosinopteryx described in Nature Communicationsthis week provides additional evidence to this effect.
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New Feathered Tyrannosaur

Meet the largest feathered animal in history – an early version of Tyrannosaurus rex, clad in long, fuzzy filaments. This newly discovered beast has been named Yutyrannus huali, a mix of Mandarin and Latin that means “beautiful feathered tyrant”. And its existence re-opens a debate about whether the iconic T.rex might have been covered in feathers.
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Microraptor Feather Colour

A team of American and Chinese researchers has revealed the color and detailed feather pattern of Microraptor, a pigeon-sized, four-winged dinosaur that lived about 130 million years ago. The non-avian dinosaur’s fossilized plumage, which had hues of black and blue like a crow, is the earliest record of iridescent feather color. The findings, which suggest the importance of display in the early evolution of feathers, will be published in the March 9 edition of the journal Science.
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