By Will Dunham WASHINGTON (Reuters) -Scientists have unearthed in Arizona fossils from an assemblage of animals, including ...

A bill in the Arizona Legislature would designate Sonorasaurus as the official state dinosaur. Why Sonorasaurus? Amateur fossil hunters found the only known specimen in the world in southern ...

Arizona is a state known for its breathtaking outdoor views, and this State Park is by no means an exception to that trend, ...

Fossil shaped like a human ear has National Park Service asking questions about its origin in Arizona recreation area.

State residents are voting for three seats on the Arizona Corporation Commission, which has come under scrutiny for its continued support of fossil fuels and resistance to supporting more solar in ...

A collection of 3-million-year-old bones unearthed 50 years ago in Ethiopia changed our understanding of human origins.

Arizona Senate President Warren Petersen sent a letter to President Donald Trump's Environmental Protection Agency, urging it to avoid California's energy policies that he says have a ripple effect.

The fossils, entombed in rock rich with volcanic ash, provide a snapshot of a thriving tropical ecosystem crisscrossed by rivers on the southern edge of a large desert.

Fossil shaped like a human ear has National Park Service asking questions about its origin in Arizona recreation area.

Fossil shaped like a human ear has National Park Service asking questions about its origin in Arizona recreation area.

WASHINGTON (Reuters) -Scientists have unearthed in Arizona fossils from an assemblage of animals, including North America's oldest-known flying reptile, that reveal a time of transition when ...

Fossil shaped like a human ear has National Park Service asking questions about its origin in Arizona recreation area.