Not much has changed at Ironwood Forest National Monument since President Clinton set aside the remote swath of mountains and desert west of Tucson in 2000. Only a few paved roads lead into the ...

It's really one of the most important species in the Sonoran Desert. It's what we'd call a keystone species. The range of ironwood matches up almost perfectly with the extent of the Sonoran Desert ...

But not always. Like, in North America’s Sonoran Desert, the iconic saguaro cactus has hundreds of other species depending on it for their survival. This makes it a keystone species: a species ...

A rare fossil unearthed in Mongolia's Gobi Desert has led to the identification of a new dinosaur species Duonychus tsogtbaatari. Dinosaurs from the Cretaceous. A biological rule that lasted ...

A rare new species of two-clawed dinosaur has been discovered by scientists in Mongolia's Gobi Desert. The species, named Duonychus tsogtbaatari, was unique within a group of dinosaurs called ...

With distinctive two-fingered claws, the remains of a previously unknown species of dinosaur suggest ... unearthed the fossil in Mongolia’s Gobi Desert, and the find is unique because the ...

In 2007, biologists named these potent molecules after a popular concept in ecology. “Keystone species,” such as starfish in Pacific Northwest tidepools, aren’t abundant, but they have outsize effects ...