Search for Life Archive
25 November 2015, 11:13 AM ET
And 'how much longer until a new discovery shouts it out?' asks the Science @ NASA video series. In July 2014, NASA announced the discovery of Kepler-452b, a planet slightly larger than Earth that resides in the habitable zone of its solar system.
24 November 2015, 08:00 AM ET
Astronauts aboard the International Space Station are testing beverage cups that let them literally wake up and smell the coffee.
18 November 2015, 07:30 AM ET
We could find small planets close to Earth using a new technique being tested on our own sun.
18 November 2015, 07:01 AM ET
Powerful eruptions from its host star may have stripped away the Earth-like exoplanet Kepler-438b's atmosphere, rendering the world uninhabitable, a new study suggests.
16 November 2015, 01:34 PM ET
The new video, which the European Space Agency (ESA) released last week, reconstructs history's first-ever soft touchdown on a comet, which was performed by the Rosetta mission's Philae lander on Nov. 12, 2014.
15 November 2015, 03:07 PM ET
Pulsars, dwarf planets and alien worlds break records, a strange space object falls from the sky and Pluto's moons get weird — this is's top stories of the week.
14 November 2015, 11:32 PM ET
From a gorgeous photo of the Milky Way to a spectacular sunrise taken from the ISS, don't miss these amazing space images.
11 November 2015, 01:13 PM ET
A newly discovered planet is being called the closest Earth-size planet ever discovered, possibly providing the mouth-watering opportunity for a close-up look at the atmosphere of a rocky body around another star.
11 November 2015, 01:00 PM ET
A planet close to its parent star is hot like Venus, but rotates quickly and could have a substantial atmosphere.
08 November 2015, 01:11 PM ET
The sun stripped away most of Mars' atmosphere billions of years ago, "Star Trek" is coming back to TV and the search for signs of intelligent life around a strangely dimming star has come up empty so far. Here are's top stories of the week.
08 November 2015, 12:47 PM ET
From super-close views of the Saturn moon Enceladus' south pole to spectacular, newly released images of the October 2014 Antares rocket explosion, don't miss these amazing space images.
06 November 2015, 03:42 PM ET
Observations of a strangely dimming star thought to possibly host an alien megastructure have not turned up signs of communications from an alien civilization, although the chatter may simply be too faint to hear.
05 November 2015, 02:01 PM ET
New results from NASA's MAVEN spacecraft suggest that Mars lost most of its atmosphere — which had kept the Red Planet relatively warm and allowed it to support liquid surface water — to space about 3.7 billion years ago.
05 November 2015, 12:15 PM ET
On Oct. 6th, 1995, the reported discovery of jupiter-like exoplanet 51 Pegasi b catalyzed serious scientific quests for another Earth-like world.
05 November 2015, 10:12 AM ET
01 November 2015, 12:00 AM ET
See amazing images of the night sky and cosmos in's gallery of cosmic images posted in October 2015.
30 October 2015, 07:08 AM ET
Europa's complex chaos regions — which feature numerous cracks, ridges and other signs of geological activity — may offer a way to sample the moon's huge subsurface ocean of liquid water, which is buried beneath perhaps 60 miles of ice.
28 October 2015, 07:28 AM ET
Astronomers around the world are keeping a close eye on a mysteriously dimming star, and their observations could soon shed light on whether it is indeed surrounded by some sort of "alien megastructure."
27 October 2015, 03:46 PM ET
A star is dimming for reasons that astronomers can't explain. Is it an alien megastructure? What sort of alien megastructures would be possible?
27 October 2015, 03:30 PM ET
According to observations by Hubble and Kepler, the universe has only just begun to produce habitable worlds — what does this mean for the evolution of intelligent life?
26 October 2015, 05:56 PM ET
On Wednesday (Oct. 28), NASA's Cassini spacecraft will zoom just 30 miles (50 kilometers) above Enceladus' surface, flying through and sampling the plume of material that erupts from the satellite's south polar region.
25 October 2015, 01:16 PM ET
Scott Kelly set a new record for American spaceflight, and scientists are searching for signs of an alien civilization around a distant star. Here are's top stories of the week.
25 October 2015, 12:42 PM ET
From stunning Earth's horizon as seen from the ISS to a glittering Milky Way, don't miss these amazing space images.
19 October 2015, 05:34 PM ET
Are we the only intelligent life in the universe? Here's how we intend to find out.
19 October 2015, 07:30 AM ET
Astronomers are using the Allen Telescope Array (ATA), a system of radio dishes about 300 miles (483 kilometers) northeast of San Francisco, to hunt for signals coming from the vicinity of KIC 8462852, a star that lies 1,500 light-years from Earth.
18 October 2015, 04:21 PM ET
Mysterious dimmings from a faraway star spur speculation about "alien megastructures," some rivers on ancient Mars were dozens of miles long and Pluto's many mysteries continue to intrigue researchers. Here are's top stories of the week.
17 October 2015, 02:59 PM ET
From the best-ever views of the Saturn moon Enceladus' north pole to a stunning shot of a giant "hole" on the sun, don't miss these amazing space images.
16 October 2015, 04:09 PM ET
Author and PBS host Robert Lawrence Kuhn brings his unique, mind-bending questions to the Expert Voices platform.
16 October 2015, 03:11 PM ET
The fascinating speculation surrounding a recent Kepler observation of a star 1,500 light-years away has reignited questions of alien life in our universe and what it means for future studies.
16 October 2015, 07:30 AM ET
Mars hosts liquid water on its surface in places today, but the best way to explore these sites is a matter of contentious debate.
15 October 2015, 12:13 PM ET
NASA's Kepler space telescope has detected something weird orbiting a nearby star — is it evidence of an alien civilization? Or is it just a clump of comets?
15 October 2015, 11:30 AM ET
Aliens might have sex, assuming the benefits outweigh the risks on their home planets. What that sex would look like is an open question. But if animal antics on Earth say anything, extraterrestrial sex would be weird.
15 October 2015, 07:00 AM ET
Astronomers have developed some clever methods of detecting tiny planets orbiting distant stars.
15 October 2015, 07:00 AM ET
On Oct. 6, 1995, Michel Mayor and Didier Queloz of Switzerland's Geneva Observatory announced the discovery of 51 Pegasi b, the first alien planet ever found around a sunlike star.
14 October 2015, 03:45 PM ET
It's a virtual certainty that comets have delivered the building blocks of life to Europa's hidden ocean, according to a new study.
13 October 2015, 07:33 AM ET
Researchers have created a "habitability index" that allows them to rank alien worlds in terms of their life-hosting potential. The metric could help guide the operations of future observatories that will scan exoplanet atmospheres for signs of life.