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

Science fiction stories about “alien” invaders are often political allegories for anxieties around immigration. Now, a government website depicts non-citizens as extraterrestrials.

Aliens are back in vogue. Haven't you heard? Fascination with little green men piloting saucer-shaped UFOs was long the purview of tinfoil-hat wearing conspiracy theorists and "X-Files" devotees. But ...

The White House launched a website teasing new information on aliens, but it actually delivers immigration arrest data, including hundreds in Kansas.

Is it the invasion of the genome snatchers? Just in case the idea of aliens walking around in human skin suits wasn’t frightening enough. An outlandish study asserts that aliens might have abducted us ...