No conclusive evidence that extraterrestrial life exists has been found...yet.
A new study argues we should search for microbial life rather than human-like aliens.
There's a good reason why so many scientists disagree with claims that Earth has been visited by aliens.
One way forward would be to abandon the traditional approach of using single-dish telescopes for SETI.
We asked astronomers: are we alone in the Universe? The answer was surprisingly consistent.
The Conversation33.5 MB (download)
'I think that we will discover life outside of Earth in my lifetime. If not that, then in your lifetime,' one astronomer told us.
Scientists can't expect the unexpected if they're not open-minded about how their theories might be wrong.
The Universe is mind-bogglingly large and with the latest technology, the search is only just starting to heat up.
As more than a million people have indicated plans to partake in a citizen 'raid' on the famed Area 51 to 'see them aliens,' a scholar on the search for extraterrestrial life weighs in on the hype.
Life could exist in another solar system in a different part our galaxy. Or in another galaxy far away. We don't have the perfect technology yet to study such far away places but we're still trying.
Using AI to search for ET might help us find things we couldn't even imagine we should look for, but to succeed we also have think critically about how we create and use that technology.
New research may help us to look for messages from alien civilisations.
Scientists looking for signs of alien life from the mystery object passing through our Solar system say they've found nothing "so far".
Astronomers in Puerto Rico have picked up signal from a faint star that's not like anything they've seen before.
Colliding black holes to exploding spacecraft, 2016 was an incredible year for astrophysics.
Mysterious radiation that appears to come from star HD 164595 is more likely to have a terrestrial origin.
Some argue that it would be impossible to understand an alien language, as it wouldn't have the same grammar as humans use. But others are more optimistic.
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.
In a world of blogs, twitter and open data, scientists need to think again about how they'd communicate a discovery of alien life.
From a flyby of Pluto to the search for extrasolar planets and gravitational waves, 2015 was a monumental year for space news.
A hint of oxygen and a whiff of methane in a distant exoplanet's atmosphere may be the first evidence we discover of alien life.