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

Eventually, we'll launch a mission dedicated solely to studying an interstellar object. When that day comes, which one should ...

Australia's space agency said there's a completely rational, albeit cosmic, explanation behind the mysterious orbs that ...

Each question in the ABC 50/50 quiz has only two options: one is right; the other is wrong. But there's a catch.

Take a drive to the CIA’s Area 51 – a route with more UFO sightings and unexplained mysteries than anywhere else on Earth ...

NASA’s Viking 1 lander set down in the Chryse Planitia region of Mars. Its identical twin, Viking 2, followed on Sept. 3 of ...

Steven Spielberg’s credulity makes his latest alien contact film, Disclosure Day, mawkish and old-fashioned rather than ...

Long before modern space exploration, scientists proposed astonishing ways to contact extraterrestrials—from giant burning ...

The makers of the blockbusting sci-fi thriller reveal how they made a hit, why Kevin Spacey was almost involved and what went wrong with the sequel ...

Does anywhere in the country better represent this era of the American experiment than a self-governing tech-company town ...

Teetering near endangered status, the starlet sea anemone produces “an ancient mechanism” for fighting viruses that ...

IN a shock midnight move, the US government has swallowed 23,000 acres of public land to extend the wall of silence around ...