The Triassic period stands out in Earth’s history as the time when dinosaurs first evolved. It was followed by the Jurassic and Cretaceous periods – at the end of the latter, the dinosaurs were wiped ...

Geoscientists employed current-day stratigraphic, depositional and paleontological models, along with modern technological muscle to provide updated insights of the Cambrian period of the Grand Canyon ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

The origin of new species and the extinction of old ones has been a continual process throughout Earth's history, but at times large numbers of organisms become extinct abruptly. Such episodes are ...

Phosphorus is one of the elements that is crucial for the construction of organisms and their metabolism. Its cycle across the environments is also one of the best understood. However, it occurred to ...

Utah State University geologist Carol Dehler samples the 500-million-year-old Bright Angel Formation in Grand Canyon. The site is among several formations in a group of rocks she and colleagues are ...