Experts Gather To Discuss Whether We Should Send Messages To Aliens

This coming weekend at the annual meeting of the American Association for the Advancement of Science, experts will be discussing the potential benefits and risks of a SETI scheme in which messages about Earth — including the entire contents of Wikipedia — would be transmitted to hundreds of star systems. » 2/09/15 8:40am 2/09/15 8:40am

How The Search For Aliens Could Save Us From Environmental Collapse

It's hard to assess the sustainability of our civilization when climate scientists and ecologists have nothing to compare ourselves to. Which is why we need to learn from the success — and potential failures — of distant alien civilizations. » 11/18/14 9:00am 11/18/14 9:00am

Is It Time to Accept That We're Alone in the Universe?

We have yet to discover any signs of aliens, a troubling observation that has led to much speculation. One possible solution to the Great Silence is that nobody's out there. It's a conclusion that sounds impossible to believe, but there may be something to it. Here's why we may be alone in the universe. » 11/05/14 12:20pm 11/05/14 12:20pm

Why Search For Aliens? A Beautiful Answer, In Under 30 Seconds.

Jill Tarter, who inspired the main character in Carl Sagan's Contact, has been searching for extraterrestrial intelligence for close to 40 years. Here, in a brief but compelling video, she explains why she and so many others are driven to look for alien life. » 6/05/14 3:10pm 6/05/14 3:10pm

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

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

Meet SETI's new boss: Geoff Marcy, the planet hunter

Geoff Marcy has spent the better part of his career peering into the depths of space in the search for exoplanets and brown dwarfs. His pioneering work has resulted in the discovery of over 110 planets outside of our own solar system - including the first system of planets orbiting a distant star. But now, Marcy has… » 6/08/12 7:10am 6/08/12 7:10am

We'll Only Find Extraterrestrial Life If We Know What We're Looking For

Our probes and landers still look for life "as we know it." But we're already aware that even terrestrial life goes beyond what we once considered possible. We should use that experience, or we may literally step on alien life. » 4/28/10 2:14pm 4/28/10 2:14pm