A University of Arizona researcher is part of an effort to identify the diseases carried by ticks, and she's asking people to send her samples.

The Dragon Bravo Fire, which was sparked by lightning and has been burning since July 4, was 61 hectares in size Friday ...

A 67-year-old Texas man died while hiking at the Grand Canyon National Park amid extreme summer temperatures, according to a ...

After a 67-year-old hiker dies in the Grand Canyon, authorities warns of heat-related illness due to daytime temperatures in ...