Bronze Age China couldn’t smelt iron, making the Sanxingdui relic a truly celestial oddity.

For the believers and nonbelievers, the Pentagon answered whether UFOs or aliens have ever visited Earth, saying there is no evidence. Pentagon press secretary Maj. Gen. Pat Ryder fielded several ...

A newly spotted interstellar visitor just got an unusually close listen from California scientists — in a search for signs of technology. The verdict was less science fiction than some might have ...