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

What would the perfect planet be like?

When it comes to habitability, Earth may not provide the best example. Indeed, astrobiologists are saying we should look for planets that are more hospitable to life than ours — a new class of objects they're calling superhabitable worlds. They even know where we should look. » 1/17/14 9:00am 1/17/14 9:00am

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

Why scientists need to search for alien life on purple planets

Billions of years ago, when microbial life first emerged on Earth, our planet would have appeared purple from space. Armed with this knowledge, scientists now say we should be on the lookout for exoplanets tinged in a similar purple hue — a possible sign of extraterrestrial life. » 11/13/13 7:20am 11/13/13 7:20am

New Kepler data could change our odds of meeting aliens

Earlier this week we reported on the astounding revelation that 22% of sunlike stars in the Milky Way are orbited by potentially habitable, Earth-sized worlds. Given that there may be billions upon billions of life-friendly planets out there, it's time to revise the numbers in the Drake Equation and estimate how many… » 11/08/13 9:38am 11/08/13 9:38am

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

New message to aliens could be uploaded to New Horizons spacecraft

Astronomical artist Jon Lomberg — the same guy who helped develop the Voyager Interstellar record back in 1977 — is launching a new initiative to persuade NASA to upload a new message to the New Horizons spacecraft once its mission to Pluto is complete. He's calling it Voyager Record 2.0. » 9/20/13 6:20am 9/20/13 6:20am

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

PayPal teams up with SETI to launch PayPal Galactic (a Space Bank)

You guys. You guys, it's happening. PayPal and members of the SETI Institute (like Jill Tarter) have teamed up to bring the world/solar neighborhood PayPal Galactic. Which is basically just like PayPal, only it's for space-payments. » 6/28/13 9:40am 6/28/13 9:40am

This pathetic GIF could be the first message aliens receive from us

As if to further reinforce the stupidity of the recently launched Lone Signal project, this mind-boggingly absurd GIF was just sent on a 17.6 light-year journey to Gliese 526 in hopes that it'll get picked up by an extraterrestrial civilization. Yes, really — this is how we're going to say "hello." » 6/20/13 6:20am 6/20/13 6:20am

New Project to Message Aliens is Both Useless and Potentially Reckless

A group of scientists and entrepreneurs has created the world’s first continuous message beacon to communicate with extraterrestrial civilizations. And for a fee, people can use it to transmit their own messages into space. But not everyone thinks this project is a good idea. » 6/12/13 10:23am 6/12/13 10:23am

When it comes to exoplanets, science fiction lags way behind science

Sometimes scientific reality surpasses science fiction. That's especially the case today, given all the planets we've discovered beyond our solar system. Now that we know how common exoplanets are, says SETI astronomer Seth Shostak, most of our alien invasion stories no longer make sense. » 6/06/13 11:20am 6/06/13 11:20am