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Were Dinosaurs Cold-Blooded or Warm-Blooded? Neither, Study Finds

By Guest PostJuly 15, 2014Nature, Sciencearchaeopteryx, arctic archipelago, astrid slany, blutplaettchen, cold blooded, dinosaurs, earth, felisa smith, hautkreb, jurassic park, krebstherapie, lisburne, long extinct creatures, melanom, metabolism, new mexico, serumprobe, t rex, theory, university of arizona, warm blooded, william bligh

A study that originated in the lab of UA biologist Brian J. Enquist with UA alum John Grady suggests dinosaurs had a metabolism that was neither warm- nor cold-blooded, but somewhere in between.

Dinosaurs dominated the Earth for more than 100 million years, but all that remains today are bones. This has made it difficult to solve a long-standing and contentious puzzle: Were dinosaurs cold-blooded animals that lumbered along or swift warm-blooded creatures like those depicted in “Jurassic Park”? (more…)

Iridescent, Feathered Dinosaur Offers Fresh Evidence That Feathers Evolved to Attract Mates

By Guest PostMarch 9, 2012Scienceaerodynamic functions, anchiornis, archaeopteryx, austin, catapults, color, dinosaurs, evolution of feathers, feather pattern, feathers, fossil, four winged dinosaur, julia clarke, living birds, mark norell, mate attracting, matt shawkey, mick ellison, microraptor, modern birds, peking university, pigment, quanguo li, rui pei, thermoregulation, university of akron, university of texas, velociraptor

AUSTIN, Texas — A team of American and Chinese researchers has revealed the detailed feather pattern and color of Microraptor, a pigeon-sized, four-winged dinosaur that lived about 120 million years ago. A new specimen shows the dinosaur had a glossy iridescent sheen and that its tail was narrow and adorned with a pair of streamer feathers, suggesting the importance of display in the early evolution of feathers, as presented in the March 9 edition of the journal Science.

The research was conducted by scientists at the Beijing Museum of Natural History, Peking University, The University of Texas at Austin, the University of Akron, and the American Museum of Natural History. (more…)

Winged Dinosaur Archaeopteryx Dressed For Flight

By Guest PostJanuary 24, 2012Sciencearchaeopteryx, archaeopteryx specimen, bird evolution, bird evolutionary tree, feather structure, winged dinosaur

*The iconic, winged dinosaur Archaeopteryx was dressed for flight, an international team of researchers led by Brown University has concluded. The group identified the color of the raven-sized creature’s fossilized wing feather, determining it was black. The color and the structures that supplied the pigment suggest that Archaeopteryx’s feathers were rigid and durable, which would have helped it to fly. Results appear in Nature Communications.*

PROVIDENCE, R.I. [Brown University] — Since its discovery 150 years ago, scientists have puzzled over whether the winged dinosaur Archaeopteryx represents the missing link in birds’ evolution to powered flight. Much of the debate has focused on the iconic creature’s wings and the mystery of whether — and how well — it could fly. (more…)

Tag Archives: archaeopteryx

Were Dinosaurs Cold-Blooded or Warm-Blooded? Neither, Study Finds

Iridescent, Feathered Dinosaur Offers Fresh Evidence That Feathers Evolved to Attract Mates

Winged Dinosaur Archaeopteryx Dressed For Flight