A tent is pitched underneath the northern lights at Gates of the Arctic, the northernmost national park in the United States. This region of Alaska is among the best places on Earth for viewing ...

Over half of U.S. counties lack air quality monitoring stations, exposing 50.7 million people, especially in rural and ...

That was the first royal tomb found at near the Valley of the Kings site since the 1922 discovery of Tutankhamun's tomb—although any treasures from the latest tomb there have yet to be discovered.