Two prebiotic molecules - one related to DNA and the other to an amino acid - have been identified in a gas cloud near the center of the Milky Way.
The predominance of 'lefthandedness' amongst amino acids in meteorites isn't, after all, an indication of biological activity, say scientists.
If there's any evidence of ancient life on Mars, it's likely to be found near the surface, new research suggests - dramatically upping the chances that it'll be discovered by the Curiosity rover, set to land next month.
US scientists have come up with new evidence that the key ingredients for life were brought to our planet by comets, billions of years ago.
The building blocks of DNA have been arriving here from meteorites in greater quantity than previously thought, lending weight to the idea that the seeds of life on Earth originated in space.
New tests on what's considered the best-preserved meteorite in the world have shed light on the way asteroids may have served up a varying menu of the building blocks of life.
Some experimental samples put aside for 50 years have provided new evidence that life on earth could have been kick-started by volcanoes.
Many types of asteroid could have created the kind of amino acids used by life on Earth to build proteins and regulate chemical reactions, according to new NASA research.
The asymmetry of biological molecules may have come from space, say French scientists.