DR. G. M. DAWSON has been engaged continuously for seventeen years in geological exploration of the Western Territories of Canada, including the country from Lake Superior to the Pacific; and in the ...

Climate change may seem a uniquely 21st-century concern, but people have been wrestling with the idea for a long time.

Millenia ago, ancient farmers cleared land to plant wheat and maize, potatoes and squash. They flooded fields to grow rice. They began to raise livestock. And unknowingly, they may have been ...

A sudden explosion of new life-forms hundreds of millions of years ago may have been triggered by a major tectonic shift, new research shows. About 530 million years ago, the Cambrian explosion ...

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 ...

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 ...

Nilpena Ediacara National Park in South Australia is well known for its collection of fossils from the Ediacaran period—a geologic timespan that predates the Cambrian explosion. An international team ...

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 ...