The saguaro cactus is the iconic plant of the Arizona borderlands, and in June and early July, its fruit ripens.

TUCSON, Ariz. (AP) — Cousins Tanisha Tucker Lohse and Maria Francisco set off from their desert camp around dawn on most ...

South America is home to many distinctive and vibrant ecosystems, and even though they are very competitive they are not devoid of invasive species. Lots of south American animals have managed to ...