Should we make contact with alien life?
We continue to search for intelligent life elsewhere in the universe. But if we find ET there are those who question whether we should make contact or not.
Composite image of suspected water vapour plumes erupting at the seven o’clock position off the limb of Jupiter’s moon Europa.
There's now strong evidence that Europa might be a worthwhile place to search for life.
Mysterious radiation that appears to come from star HD 164595 is more likely to have a terrestrial origin.
Artist’s impression of the surface of the planet Proxima b, orbiting Proxima Centauri.
Scientists have finally found an Earth-like planet we may actually be able to visit.
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.
An artist’s concept of select planetary discoveries made to date by NASA’s Kepler space telescope.
The number of known exoplanets doubled this week to more than 3,200. But why have only a handful of these those new planets caught people's imagination?
We’re on the hunt for life – what do we do when we find it?
A philosopher argues that now is the time to figure it out, before we make the inevitable discovery of extraterrestrial life.
A laser could hide – or broadcast – our existence.
European Southern Observatory
There are technological ways to hide a planet from intergalactic detection – as well as ways to signal that we're just sitting here, eager for contact.
The plan to use lasers to send mini-spaceships to the stars.
It's an ambitious plan to send a micro-spaceship to our stellar neighbour but is this possible with today's technology or even technology in the near future?
Alpha Centauri is actually the outer star (bottom right) of The Pointers, which point to the Southern Cross.
Y. Beletsky (LCO)/ESO
A US$100-million plan has been announced to send tiny probes out in space in search of life elsewhere in the universe. But are they looking in the right place?
Schiaparelli separating from Trace Gas Orbiter.
If we do find life on Mars, it will be difficult to prove that we didn't bring it there from Earth. An insider talks us through what's at stake.
The ALICE detector at the Large Hadron Collider may help unravel some of nature’s grestest mysteries.
Our panel of experts speculate on which of science's biggest questions could be answered in the coming months.
The light shining through an exoplanet’s atmosphere can give us a hint of whether the planet supports life.
NASA, ESA, and G. Bacon (STScI)
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.
Is this what we’re seeing around KIC 8462852 - a colossal megastructure built by alien intelligence? Probably not. The reality might be even more interesting.
There's a lot of speculation about a star behaving strangely in our galaxy. But even if it's not evidence of alien intelligence, it's sure to be an amazing discovery.
The building blocks of life are lurking on the dark and barren surface of Comet 67P.
Two independent teams have found compounds including nitrogen and carbon dioxide on Comet 67P, which can form sugars and amino acids.
What kind of creatures might we find populating the cosmos?
Given Earth is our sole example of life in the universe, it's hard to know what we're looking for elsewhere in the cosmos.
Looking for evidence of extraterrestrial intelligent life elsewhere in the universe.
Flickr/Asbjorn Sorensen Poulsen
Astronomers have been looking for signs of intelligent life elsewhere in the universe for centuries. But the search has so far found nothing. So what makes this latest hunt so different?
What secrets will space reveal?
Why the Breakthrough Listen project is a step in the right direction in our hunt for life beyond Earth.
The 64-metre Parkes Radio telescope will be instrumental in the search for extraterrestrial intelligence.
The Parkes radio telescope is part of the US$100 million search for life elsewhere in the universe, but the investment will also benefit other space research at The Dish.
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…