Arizona’s deserts are home to some of the most shocking and elusive creatures on the planet. From bizarre nocturnal hunters to long-lost species thought to be extinct, these discoveries will leave you ...

In a 2011 study, scientists declared that tortoises living north and west of the Colorado River — the Mojave population now called Agassiz's desert tortoises, or Gopherus agassizii — are officially a ...

Mexican long-nosed bats have been identified in southeastern Arizona through citizen scientist efforts and innovative DNA technology.

TUCSON, Ariz.— Conservation groups sued the Federal Highway Administration today to challenge its approval of Interstate 11, a proposed north-south highway in Arizona that would destroy pristine ...