An extinct species of brachyuran crab called Callichimaera perplexa was a highly visual predator inhabiting well-lit environments, according to new research...
Dental cavities or caries is a common disease among modern humans, affecting almost every adult. New research shows that Microsyops latidens, a species...
An incomplete fossil record hampers reconstructing the early evolution of caimans (subfamily Caimaninae). In new research, paleontologists from Germany...
Paleontologists have identified three new species of placental mammals called condylarths (archaic ungulates) from fossils found in Wyoming, the United...
The newly-discovered fossilized footprints were made by at least two mammalian species around 58 million years ago in a brackish water lagoon in what is...
A new genus and species of owl that lived 55 million years ago (Eocene epoch) has been identified from a partial skeleton found in Wyoming, the United...
A new species of carnivorous theropod dinosaur has been identified from the fossilized remains discovered in the 1990s in northeastern Utah and Wyoming, the...
A new species of carnivorous bird-like dinosaur being named Hesperornithoides miessleri has been discovered by an international team of paleontologists...
A slab of grayish limestone shale from the Eocene Green River Formation, the United States, caught a school of Erismatopterus levatus, an extinct species...
A fossilized dinosaur foot believed to be the largest in the world has been unearthed in Weston County, Wyoming, the United States.
This illustration shows...
New research reveals that a well-preserved 52-million-year-old bird fossil specimen from the early Eocene of Wyoming, the United States, is from a previously...
A new species of sauropod dinosaur that lived about 152 million years ago (Jurassic period) has been identified from fossils found in Wyoming.
Galeamopus...
A nearly 50-million-year-old bird fossil unearthed in Wyoming represents a new species that is a close relative of living kiwis, ostriches, and emus, according...
A distinctive pattern of tooth marks on a 66-million-year-old tyrannosaur bone found in eastern Wyoming offers one of the best evidences yet that tyrannosaurid...
A new species of basilisk (or so-called Jesus lizard, named so for their ability to walk on water) that lived about 48 million years ago during Eocene,...
A tiny bird fossil, named Eocypselus rowei, offers clues to the precursors of hummingbird and swift wings.
Specimen of Eocypselus rowei (Daniel T. Ksepka...
