A fragment of upper jaw fossil from the Early Cretaceous is among the oldest examples of a toothless amphibian in the fossil record Chihiro Kai The arid valleys of Wyoming’s Cloverly Formation are ...

He learned from some of the greats, including Lance Grande, one of the world's leading experts on the paleontology of the Green River Formation. Beginning in the 1980s, Lindgren ran his own commercial ...

Around 230 million years ago, at least 19 alligator-size amphibians expired together on an ancient floodplain in what is now Wyoming. The animals' fossilized remains, uncovered across four excavations ...

The first day of the field season dawns clear and bright, with an already strong sun sliding up from behind Cloud Peak, the highest in the Bighorn Mountains. Down here in the basin it is already warm ...

Nick Hornicak of North Huntingdon digs dinosaurs, literally. The 24-year-old Indiana University of Pennsylvania graduate student was part of a team of fellow dinosaur diggers who in June worked in the ...

Ancient lakes The fossils were found in a portion of what’s known as the Green River Formation — “one of the largest documented accumulations of (lake) sedimentary rock in the world,” according to a ...