What if aliens are deliberately keeping quiet for fear that they might be destroyed? In 1974 we sent the Arecibo radio message towards Messier 13. The message was mostly symbolic; we weren’t really ...

We have no good reason to believe that aliens have ever contacted Earth. Sure, there are conspiracy theories, and some rather strange reports about harm to cattle, but nothing credible. Physicist ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

One of the greatest conundrums to face humanity is why we have yet to make first contact with extraterrestrial life. Some explanations are better than others. Over at io9, George Dvorsky tells us ...

Does this also explain why there are no aliens? Around 2 billion years ago, life had plateaued in complexity, ruined the atmosphere, and was on the verge of self-annihilation. But then something ...