Confirmation of alien life would answer one enormous question and immediately create dozens more. Humanity’s reaction would ...

Imagine receiving a message from another world. Not from a distant galaxy millions of light years away, but from a planet orbiting the nearest star system to our own. A mysterious signal appears on ...

Most of our experience with the Search for Extraterrestrial Intelligence (SETI) has focused on capturing radio signals that alien species have sent out, whether intentionally or unintentionally. That ...

Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how ...

John Brandenburg—a plasma physicist at an aerospace development company—argues that there was an alien civilization on Mars. He cites data from NASA’s Curiosity rover, claiming that xenon levels on ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Searching for extraterrestrial intelligence has so far primarily meant focusing on one particular type of signal—and that signal has normally been based on our own current cutting-edge technology. But ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new paper. Reading time 3 minutes In our search for life beyond Earth, we might ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London. Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and ...

Scientists around the world have spent decades pointing radio telescopes at the sky, hoping to catch that one signal proving we’re not alone in the universe. But now researchers at SETI are asking: ...