On a high plateau in northwestern Argentina, a cluster of turquoise lagoons has quietly rewritten what scientists thought they knew about the earliest stirrings of life. Hidden in one of the driest ...

That would make it thousands of times more massive than any moon orbiting a solar system plane  — so massive it could make ...

In the vast and lonely Arizona desert about 50 miles south of Las Vegas, tourists who took a wrong turn stumbled across a woman's naked and bloodied body on Dec. 12, 1989. Two days later and nearly ...