Frilled-neck lizards rely on one of the most dramatic defensive displays in the animal kingdom, rapidly expanding a large ...

Arizona is full of mesmerizing hidden gems, and these beautiful, lesser-known spots are ready to win your heart.

The Sahara Desert was once a dramatically different environment with rivers lakes and dense wildlife Fossil discoveries ...

This California desert hike leads through narrow canyons and volcanic rock with metal rings that turn a simple walk into a ...

In the world of rattlesnakes, size records are usually dominated by heavyweights such as eastern and western diamondbacks, ...

In California, where getting into popular outdoor spots sometimes feels harder than getting concert tickets, this is ...

What we see is that it was an active hunter, which tells us a lot about how we can compare it, for example, to modern-day ...

The nearly complete skull was found in 2001 in the Méndez Formation in Nuevo León, northeastern Mexico, dozens of kilometers ...

It was the top predator; that was its place in the food chain. There was none bigger or more dangerous than it.” ...

A skull found 25 years ago in northern Mexico has led to the definition of a new species of marine reptile, scientists ...

It's springtime and that means it's desert tortoise adoption season. Would you like to adopt a tortoise and help conservation?

The Arizona Game and Fish Department is seeking adoptive homes for more than 100 desert tortoises as the reptiles emerge from winter brumation this spring.