Earth’s deep past leaves plenty of unanswered questions. None currently proves an alien visit, but scientists know the ...

The Fermi paradox raises a key question: Given the likelihood of intelligent extraterrestrial life, why is there still no compelling evidence of it? A new theory, described in a paper not yet ...

The physicist explained what he finds so terrifying about the prospect of us being alone in the universe ...

"Disclosure" has become a cult word. It shouldn't be, since all it means, technically, is to reveal something. But the new wave of alien conspiracy theorists have made "disclosure" into a teasingly ...

What if aliens were building a massive power plant?Last time, I talked about the "Kardashev scale," which classifies the ...

The real terror of the Alien franchise doesn’t come from the monsters. No, it turns out that the real threats are the people in power back on Earth. The world’s ...

Everyone loves a good alien invasion story, preferably one with city-sized ships and physics-defying tech. There's just one big problem with that. The Milky Way is estimated to contain 100 to 400 ...