People say a dog is a man’s best friend, but the black and white cat Manny is Lisa Frazee’s best friend. That bond was tested ...

WASHINGTON — Federal officials said Thursday they are trying to determine whether a wolf-like animal that has been repeatedly spotted in an area north of the Grand Canyon is an endangered gray wolf, ...

A treasure trove of exceptionally preserved early animals from more than half a billion years ago has been discovered in the Grand Canyon, one of the natural world’s most iconic sites. The rich fossil ...

One hundred bison from the North Rim of the Grand Canyon were successfully relocated to the Cheyenne River Sioux Tribe in South Dakota. Officials say the move was done to help manage overpopulation.