Using mitochondrial DNA, researchers have discovered that every horse that’s ever roamed Mother Earth can be traced to a single female ancestor that lived about 140,000 years ago...

Update: The deadline for this writing competition has been extended to March 1, 2012 and a second prize, an iPad, has been added ...

Reform program aims to increase birth control, strengthen humane animal care and handling After a yearlong review, the U.S...

On the Yakama Indian Reservation in southern Washington, wild horses trample the grass hills to dust...