Funcusvermis gilmorei lived in the tropical forests of what is now Arizona, the United States, during the Triassic period, approximately 220 million years...
Paleontologists have identified a new species of tuatara-like sphenodontian reptile from dozens of fossilized specimens found in Arizona, the United States.
Holotype...
Paleontologists have uncovered a previously unknown species of cynodont that lived during the Triassic period in what is now Arizona, the United States.
An...
Leaf-cutter bees, members of the genus Megachile, are among the most recognizable solitary bees due to their habit of cutting out small circles of leaves...
Dilophosaurus wetherilli was the largest animal known to have lived on land in North America during the Early Jurassic. Despite its charismatic presence...
New research suggests that during the Late Cretaceous epoch to the Early Paleogene epoch (80-50 million years ago), much of the southwestern United States...
Paleontologists in Arizona have identified microfossils of what are thought to be the oldest known frog relative in North America.
A Chinle frog, inside...
A new genus and species of herbivorous ceratopsid (horned) dinosaur being named Crittendenceratops krzyzanowskii has been discovered by paleontologists...
Scientists studying ancient corncobs found at Antelope House, an Ancestral Puebloan ruin located at Canyon de Chelly National Monument, Arizona, have discovered...
Geologists have discovered a set of 28 footprints left behind by an ancient reptile approximately 310 million years ago in what is now Grand Canyon National...
Sauropods are a group of plant-eating dinosaurs which exceeded all other terrestrial vertebrates in body size. A new, in-depth anatomical description of...
Colonies of the red harvester ant (Pogonomyrmex barbatus) forage in the desert for seeds that provide both food and water. Foragers lose water while out...
A research team led by Rutgers University’s Professor Dennis Kent has documented a gradual shift in Earth’s orbit that repeats regularly every 405,000...
A team of geologists led by Dr Brenda Buck from the University of Nevada-Las Vegas has discovered naturally occurring asbestos minerals in Clark County...
Dr Shannon Still, a biologist with Chicago Botanic Garden, has described two new species of desert poppies from the deserts of California and Arizona.
Eschscholzia...
Biologists have announced the discovery of a new species of scorpion, named Vaejovis brysoni, in the Santa Catalina Mountains in southern Arizona.
Female...
