The Tyrannosaurus rex and its fellow theropod dinosaurs that rampage across the screen in movies like Jurassic World were successful predators partly due to a unique, deeply serrated tooth structure that allowed them to easily tear through the flesh and bone of other dinosaurs, says new research from the University of Toronto Mississauga.
Measurements of iron speciation in ancient rocks were used to construct the chemistry of ancient oceans. Analysis suggests that it took less oxygen than previously thought to trigger the appearance of complicated life forms.
The discovery of a four-legged fossil of a snake hints that this suborder may have evolved from burrowing, rather than marine, ancestors.
New research has revealed abrupt warming, that closely resembles the rapid man-made warming occurring today, has repeatedly played a key role in mass extinction events of large animals, the megafauna, in Earth's past.
A large genome-scale study conducted by an international team headed by the Centre for GeoGenetics at the University of Copenhagen reveal that the ancestors of all present-day Native Americans arrived in the Americas as part of a single migration wave, no earlier than 23 KYA. The team also reports a later gene flow into some Native Americans from groups related to present-day East Asians and Australo-Melanesians.
Fossil fuel emissions could soon make it impossible for radiocarbon dating to distinguish new materials from artifacts that are hundreds of years old.
Mammals were evolving up to 10 times faster in the middle of the Jurassic than they were at the end of the period, coinciding with an explosion of new adaptations, new research shows.
A newly identified species of feathered dinosaur is the largest ever discovered to have a well-preserved set of bird-like wings, research suggests.
Head-butting and canine display during male-male combat first appeared some 270 million years ago. This is what researchers from the Evolutionary Studies Institute at Wits found when they conducted an updated and more in-depth study of the herbivorous mammalian ancestor, Tiarajudens eccentricus, discovered four years ago.
Dr. Leandro Gaetano and Professor Fernando Abdala from the University of the Witwatersrand's Evolutionary Studies Institute have completed the first detailed and comprehensive analysis on the ear bone of Triassic cynodonts, and have found some noticeable variations in the morphology of this bone -- even among animals of the same species.