14 Intriguing Ways We Could Detect Signs Of An Alien Civilization

For the past 50 years, our efforts to detect extraterrestrial civilizations have largely focused on the search for radio emissions. But this is hardly the only strategy at our disposal. Here are 14 intriguing ways we could prove that aliens really exist. » 4/11/14 10:00am 4/11/14 10:00am

How would humanity change if we knew aliens existed?

We have yet to discover any signs of an extraterrestrial civilization — a prospect that could quite literally change overnight. Should that happen, our sense of ourselves and our place in the cosmos would forever be shaken. It could even change the course of human history. Or would it? » 2/14/14 8:10am 2/14/14 8:10am

A New Scientific Model that Defines Alien Intelligence

Should we ever detect an extraterrestrial civilization, or any kind of alien life for that matter, it's a safe bet they'll look very different from us. They'll also probably think in a way that's completely foreign to what we're used to. Here's how experts believe we might be able to predict what the minds of aliens… » 1/28/14 11:14am 1/28/14 11:14am

Congress Just Held a Remarkable Two-Hour Hearing on Aliens

In a refreshingly pro-science move, the House Science Committee set aside two hours yesterday to discuss the ongoing search for extraterrestrial life. The ensuing conversation was fascinating, but at times infuriating, with the experts discussing everything from alien biosignatures to the possibility that we're being… » 12/05/13 8:00am 12/05/13 8:00am

Could we detect signs of alien life on a dying planet?

Scientists say that we should be on the lookout for purple planets, a possible sign of primordial extraterrestrial life. But what about the biosignatures of exoplanets that are dying? A recent study concluded that it is indeed possible — we just have to recognize the signs. » 11/25/13 1:20pm 11/25/13 1:20pm

How Self-Replicating Spacecraft Could Take Over the Galaxy

Forget about generation ships, suspended animation, or the sudden appearance of a worm hole. The most likely way for aliens to visit us — whatever their motive — is by sending robotic probes. Here's how swarms of self-replicating spacecraft could someday rule the galaxy. » 11/13/13 10:03am 11/13/13 10:03am

Some of the Most Plausible Scenarios for Alien Civilizations

We have yet to make contact with an extraterrestrial intelligence, making it exceedingly difficult for us to imagine what an alien civilization might be like. But that doesn’t mean we can’t make some educated guesses. Here’s what we know — and don’t know — about aliens. » 11/04/13 11:00am 11/04/13 11:00am

How we could start looking for alien transmitters in our solar system

SETI now has the technology to go snooping for extraterrestrials in our own backyard. No, not as close as little green men cutting up crop circles. Rather, we should be able to detect an alien device positioned somewhere between the sun to 30 times farther out than Pluto. » 10/17/13 1:30pm 10/17/13 1:30pm

SETI pioneer John Billingham has passed away

One of the true pioneers of SETI has left us. John Billingham played a major role in legitimizing the once far-out idea of searching for and communicating with extraterrestrial intelligence using radio astronomy. » 8/12/13 11:20am 8/12/13 11:20am

NASA Scientist to Scour Kepler Data in Search of Alien Technologies

The Kepler space telescope may be dead in the water, er space, but the data it has collected over the years lives on. A new initiative is set to use this data in an effort to locate alien spaceships, Dyson spheres, and a galactic laser internet — and they've been given $200,000 to make it happen. » 7/26/13 2:40pm 7/26/13 2:40pm

It’s Easier for Aliens to Visit Us Than Previously Thought

A new study suggests that by using the slingshot effect to propel self-replicating probes through interstellar space, an advanced extraterrestrial civilization should be able to visit every corner of the galaxy in a startlingly short amount of time. The Fermi Paradox, it would seem, is alive and well. » 7/25/13 8:15am 7/25/13 8:15am

How to detect massive alien spaceships powered by stars

Some visionaries speculate that extraterrestrial civilizations may be capable of using the energy extracted from their suns to power planet-sized spaceships. A professor from the University of Edinburgh says he knows how we might be able to find such objects. » 6/26/13 2:37pm 6/26/13 2:37pm

Are we screwing ourselves by transmitting radio signals into space?

For nearly a hundred years, Earth has sent radio signals into space. If anyone nearby is listening, they probably know we’re here. In light of this, a new paper assesses the potential danger presented by such signals, concluding that the benefits outweigh the risks. But how can we really know? » 5/07/13 2:02pm 5/07/13 2:02pm

How to Measure the Power of Alien Civilizations Using the Kardashev…

We have yet to make contact with an extraterrestrial civilization. If they're out there — and surely they must be — we haven't the foggiest idea what they might be like. Or do we? » 2/25/13 11:00am 2/25/13 11:00am

SETI Conducts First Ever Targeted Search For Intelligent Life On…

In what is its most targeted search to date, the SETI Institute has scanned 86 potentially habitable solar systems for signs of radio signals. Needless to say, the search came up short (otherwise the headline of this article would have been dramatically different), but the initiative is finally offering some… » 2/08/13 12:24pm 2/08/13 12:24pm