Dinosaur

Gene Expression

Tag archives for Dinosaur

Tiny Tyrannosaurus rex

Tyrannosaurid Skeletal Design First Evolved at Small Body Size: Tyrannosaurid dinosaurs comprised nearly all large-bodied predators (>2.5 tons) on northern continents during the Late Cretaceous. We show that their most conspicuous functional specializations–a proportionately large skull, incisiform premaxillary teeth, expanded jaw-closing musculature, diminutive forelimb, and a hindlimb with cursorial proportions–were present in a new small-bodied,…

Dinosaur mass extinction debate

There are two posts on ScienceBlogs which highlight two perspectives on the Dinosaur mass extinction, What Wiped Out The Dinosaurs? and K-T extinction debates: cranky “skeptics” or reasonable science?. I’d assumed that the Asteroids-from-the-sky was the clear consensus, but please see this old BloggingHeads.TV clip where Peter Ward seems to imply that the waters are…

Post-Cretaceous Dinosaurs

New Geochronologic And Stratigraphic Evidence Confirms The Paleocene Age Of the Dinosaur-Bearing Ojo Alamo Sandstone And Animas Formation In The San Juan Basin, New Mexico and Colorado: …An assemblage of 34 skeletal elements from a single hadrosaur, found in the Ojo Alamo Sandstone in the southern San Juan Basin, provided conclusive evidence that this assemblage…