Two exhibitions on view in New York delve into artists' long-standing fascination with the unknown, and what it says about ...

I do not believe in ghosts, and yet I have no explanation for what happened almost 20 years ago in the Gold Country of ...

Scientists who once rolled their eyes at flying saucer stories are now treating strange things in the sky as a serious ...

Unexplained flashes of light captured during sky surveys in the 1950s have puzzled researchers for decades. Some suggest ...