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...
