This artist’s rendering shows OSIRIS-REx spacecraft descending toward asteroid Bennu to collect a sample of the asteroid’s surface.
NASA/Goddard/University of Arizona
OSIRIS-REx will touch down on asteroid Bennu, collect a sample of the dust and begin its journey back to Earth, where scientists will study it, hoping to learn secrets of the solar system's origin.
There seems to be a network of underground bodies of liquid water at Mars’ south pole.
NASA/JPL/Malin Space Science Systems
New findings boost chances of finding life on Mars, but there are better candidates in the solar system.
Purple microbial mats offer clues to how ancient life functioned.
How ancient microbes survived in a world without oxygen has been a mystery. Scientists discovered a living microbial mat that uses arsenic instead of oxygen for photosynthesis and respiration.
A radar mosaic image of Venus.
News that Venus may harbor life has swept the globe. So how do we find out for sure? A planetary scientist explains what's next.
JAXA / ISAS / DARTS / Damia Bouic
The discovery of phosphine in the acidic clouds of Venus can't be explained by any known chemical or geological processes.
They probably won’t look anything like this.
The Earth may be crawling with undiscovered creatures with a different biochemistry to life as we know it.
People do live outside Earth – on the International Space Station! But humans have had to find a way to make the conditions there more like what we’re used to at home.
Flickr/NASA's Marshall Space Flight Center
The short answer is yes, but it’s really, really difficult.
Scientists conduct research in Hawai'i Volcanoes National Park to practice for Mars landings.
To prepare for future Mars missions, scientists collect samples and simulate communications conditions from volcano parks on Earth.
Scale models of rockets at China Aerospace Science and Technology Corporation’s booth at the International Astronautical Congress.
The space industry and global interest in all matters inter-planetary is growing.
The south polar cap of Mars is hiding a subsurface lake, according to new research.
Studies from our own planet shed light on whether there could be life in a subglacial lake on Mars.
Kepler 452-b is looking like a good candidate for having evolved life.
NASA Ames/JPL-Caltech/T. Pyl
Life could have evolved on exoplanets Kepler-452b and Kepler-62e, according to a new study.
Following NASA's latest discovery of organic matter on the red planet, new findings in a salt lake in California could point to where to look for alien life.
The Viking landers in the 1970s were the last to look directly for life on Mars.
Planetary protection protocols try to make sure we don't seed places like Mars with life from our planet. An astrobiologist argues they're misguided – especially with human astronauts on the horizon.
Spend many months attached to the ISS and see how well you grow.
If you want to live on Mars, you're going to need to grow food. Seeds are naturally equipped to handle challenging Earth environments, but how well can they survive what they'll encounter off-planet?
Even if alien life is never discovered, all is not lost.
Artist’s impression of Cassini ending its life as a fireball in Saturn’s atmosphere.
Cassini is about to crash into Saturn to avoid contaminating its habitable moon Enceladus.
A likely candidate for life: Saturn’s icy moon Enceladus.
NASA/JPL-Caltech/Space Science Institute
There has been much excitement this week about the possibility of water -- and life -- on some newly discovered exoplanets. But we can look closer to home for evidence of ET.
Artist’s rendition of one of the billions of rocky exoplanets in our galaxy.
Did life once exist on its surface?
Complex life may be rare in the universe because most planets become either too hot or too cold before life has a chance to get a foothold. This might explain why we have yet to bump into E.T.
Could this ever happen between close planetary neighbours?
New research gives a clue about what happens when there are two habitable worlds in the same solar system.
No green little men as far as the eye can see.
As far as underwhelming headlines go: “No Alien Life Found on Comet” must rank very close to the top. An article with this title appeared in the Guardian on July 6 in response to a story claiming that…