The unusual specimen raised eyebrows because it appeared capable of causing levitation. An official investigation has not settled the matter, some UFO enthusiasts say.

NASA is returning a Martian alien sample to Earth, providing insights into the composition of Mars and potential signs of ...

"Alien: Earth," which begins streaming on Hulu and FX on Tuesday, follows a group of travelers with various jobs that are drawn into action when a spacecraft carrying alien samples crash-lands on ...