A growing number of charismatic Christians see themselves as waging a spiritual battle against the forces of Satan. Sometimes ...

Looking up reveals nature’s skylight, framing Arizona blue against fiery red stone in perfect composition. Photo credit: ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...